Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads to the venue to rehearse the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads to the venue to rehearse the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads to the venue to rehearse the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Akira Yoshino, a co-winner of the 2019 Nobel Prize in chemistry, leaves a hotel in Stockholm on Dec. 10, 2019, to attend a rehearsal for the Nobel Prize award ceremony. (Pool photo) (Kyodo via AP Images) ==Kyodo

Akira Yoshino, a co-winner of the 2019 Nobel Prize in chemistry, leaves a hotel in Stockholm on Dec. 10, 2019, to attend a rehearsal for the Nobel Prize award ceremony. (Pool photo) (Kyodo via AP Images) ==Kyodo

Nobel Peace Prize 2018 winner Nadia Murad, right, poses for a selfie with Tania Chytil, front left, moderator, Brazilian Hamangai Pataxo, back left, activist for the rights of indigenous peoples, Congolese activist Rebecca Kabuo, 2nd left, British sisters activists Ella Meek, 3red right, and Amy Meek, founders of the campaign and the association "Kids Against Plastic", and Malawian child rights activist Memory Banda, front right, during the Young Activists Summit - YAS19 at the European headquarters of the United Nations in Geneva, Switzerland, Tuesday, Dec. 10, 2019. (Salvatore Di Nolfi/Keystone via AP)

El presidente del Comit?? Nobel, Berit Reiss-Andersen, izquierda, entrega el Premio Nobel de la Paz al primer ministro et??ope Abiy Ahmed durante una ceremonia en el ayuntamiento de Oslo, Noruega, martes 10 de diciembre de 2019. (Hakon Mosvold Larsen/NTB Scanpix via AP)

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Japanese scientist Akira Yoshino, one of the three winners of 2019 Nobel Prize in Chemistry, heads for the venue to attend the Nobel Prize ceremony with his wife Kumiko in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Sweden's King Carl Gustaf adjusts a pillow for Queen Silvia at the Nobel award ceremony at Stockholm Concert Hall, in Stockholm, on Tuesday Dec. 10, 2019. (Claudio Bresciani / TT Pool via AP)

Turkey's President Recep Tayyip Erdogan speaks at a World Human Rights Day event, in Ankara, Turkey, Tuesday, Dec. 10, 2019. Erdogan has protested Nobel Prize for awarding Austrian author Peter Handke in literature and said that "Nobel has consumed itself. Nobel is of no value to me." Asked whether he would accept a Nobel prize if he were to be awarded one, Erdogan said: "I would not accept it." (Presidential Press Service via AP, Pool)

The Nobel Prize presentation ceremony is held in Stockholm, Sweden on December 10, 2019. ( The Yomiuri Shimbun via AP Images )

The Nobel Prize presentation ceremony is held in Stockholm, Sweden on December 10, 2019. ( The Yomiuri Shimbun via AP Images )

The Nobel Prize presentation ceremony is held in Stockholm, Sweden on December 10, 2019. ( The Yomiuri Shimbun via AP Images )

The Nobel Prize presentation ceremony is held in Stockholm, Sweden on December 10, 2019. ( The Yomiuri Shimbun via AP Images )

Chemistry laureate John B. Goodenough, left, receives the prize from King Carl Gustaf of Sweden, during the Nobel Prize award ceremony, at the Stockholm Concert Hall, in Stockholm, Monday, Dec. 10, 2019. (Jonas Ekstromer / TT News Agency, Pool via AP)

Chemistry laureate M. Stanley Whittingham, left, receives the prize from King Carl Gustaf of Sweden, during the Nobel Prize award ceremony, at the Stockholm Concert Hall, in Stockholm, Monday, Dec. 10, 2019. (Jonas Ekstromer / TT News Agency, Pool via AP)

Chemistry laureate Akira Yoshino, left, receives the prize from King Carl Gustaf of Sweden, during the Nobel Prize award ceremony, at the Stockholm Concert Hall, in Stockholm, Monday, Dec. 10, 2019. (Jonas Ekstromer / TT News Agency, Pool via AP)

Winner of 2019 Nobel Prize in Chemistry Japanese Akira Yoshino attends the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Winner of 2019 Nobel Prize in Chemistry Japanese Akira Yoshino attends the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Winner of 2019 Nobel Prize in Chemistry Japanese Akira Yoshino attends the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Winner of 2019 Nobel Prize in Chemistry Japanese Akira Yoshino attends the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Winner of 2019 Nobel Prize in Chemistry Japanese Akira Yoshino attends the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Physiology or Medicine laureate William G. Kaelin Jr, left, receives the prize from King Carl Gustaf of Sweden, during the Nobel Prize award ceremony, at the Stockholm Concert Hall, in Stockholm, Monday, Dec. 10, 2019. (Jonas Ekstromer / TT News Agency, Pool via AP)

Winner of 2019 Nobel Prize in Chemistry Japanese Akira Yoshino attends the Nobel Prize ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

Physiology or Medicine laureate Sir Peter J. Ratcliffe, left, receives the prize from King Carl Gustaf of Sweden, during the Nobel Prize award ceremony at the Stockholm Concert Hall, in Stockholm, Tuesday, Dec. 10, 2019. (Jonas Ekstromer/TT News Agency via AP)

Physiology or Medicine laureate William G. Kaelin Jr, left, receives the prize from King Carl Gustaf of Sweden, during the Nobel Prize award ceremony at the Stockholm Concert Hall, in Stockholm, Tuesday, Dec. 10, 2019. (Henrik Montgomery/TT News Agency via AP)

Physiology or Medicine laureate Gregg L. Semenza, left, receives the prize from King Carl Gustaf of Sweden, during the Nobel Prize award ceremony at the Stockholm Concert Hall, in Stockholm, Tuesday, Dec. 10, 2019. (Jonas Ekstromer/TT News Agency via AP)

Polish author Olga Tokarczuk, left, receives the Nobel prize from King Carl Gustaf of Sweden, during the Nobel Prize award ceremony at the Stockholm Concert Hall, in Stockholm, Tuesday, Dec. 10, 2019. (Jonas Ekstromer/TT News Agency via AP)

Austrian author Peter Handke, left, receives the 2019 Nobel Prize from King Carl Gustaf of Sweden, during the Nobel Prize award ceremony at the Stockholm Concert Hall, in Stockholm, Tuesday, Dec. 10, 2019. (Jonas Ekstromer/TT News Agency via AP)

Carl XVI Gustaf of Sweden gives a medal and award certificate Winner of 2019 Nobel Prize in Chemistry Japanese Akira Yoshino during the Nobel Prize awards ceremony in Stockholm, Sweden on December 10, 2019. 71-year-old honorary fellow with Asahi Kasei Corp. and a professor at Meijo University in Nagoya City, has been awarded to a trio of scientists for the development of lithium-ion batteries. ( The Yomiuri Shimbun via AP Images )

A demontrator protests against the literature award to Austrian author Peter Handke in front of the Stockholm Concert Hall, in Stockholm prior the Nobel awards ceremony on December 10, 2019. (Photo by Karin WESSLEN / TT News Agency / AFP) / Sweden OUT

Guests and officials arrive at the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Guests take pictures in front of a bust of the Nobel Prize founder, Alfred Nobel prior the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

The writing 'The Nobel Prize' is pictured on stage prior start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Guests and officials sit prior the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Flags of Sweden and Norway and a sign reading 2019 with a profile of the Nobel Prize founder, Alfred Nobel are pictured prior the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Guests and officials sit prior the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

(LtoR) Co-laureates of the 2019 Nobel Prize in Chemistry: US materials scientist, a solid-state physicist John Goodenough, English-American chemist M. Stanley Whittingham and Japanese chemist Akira Yoshino arrive for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

(LtoR) Co-laureates of the 2019 Nobel Prize in Physiology or Medicine US professor of medicine William G. Kaelin, British physician-scientist Sir Peter J. Ratcliffe and US professor of pediatrics, radiation oncology, biological chemistry, medicine, and oncolog Gregg L. Semenza arrive for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

(LtoR) The Laureates of The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel Michael Kremer (R), Esther Duflo (2ndR) and Abhijit Banerjee (3rdR) and Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk (2ndL) and Austrian author and co-laureate of the 2019 Nobel Prize in Literature Peter Handke (3rdL) arrive for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

King Carl XVI Gustaf of Sweden arrives for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Queen Silvia of Sweden (L) and Crown Princess Victoria of Sweden arrive for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Crown Princess Victoria of Sweden arrives for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Crown Princess Victoria of Sweden arrives for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

King Carl XVI Gustaf of Sweden (L) and Queen Silvia of Sweden arrive for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Crown Princess Victoria of Sweden waits before the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

(LtoR) US economist and co-laureate of the 2019 Nobel Prize in Economic Sciences Abhijit Banerjee (R) and Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk (L) and Austrian author and co-laureate of the 2019 Nobel Prize in Literature Peter Handke (C) arrive for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

(LtoR) The legs of the laureates of The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel French-American economist Esther Duflo (R) and US economist Abhijit Banerjee (C) are pictured as they arrive for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Laureates of the 2019 Nobel Prize wait for the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Laureates of the 2019 Nobel Prize wait for the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Laureates of the 2019 Nobel Prize arrive for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Canadian-American astrophysicist, astronomer, and theoretical cosmologist and co-laureate of the 2019 Nobel Prize in Physics James Peebles receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Canadian-American astrophysicist, astronomer, and theoretical cosmologist and co-laureate of the 2019 Nobel Prize in Physics James Peebles receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Swiss astrophysicist, professor emeritus and co-laureate of the 2019 Nobel Prize in Physics Michel Mayor receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Swiss astrophysicist, professor emeritus and co-laureate of the 2019 Nobel Prize in Physics Michel Mayor receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Swiss astrophysicist, professor emeritus and co-laureate of the 2019 Nobel Prize in Physics Michel Mayor receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

(1stRow) King Carl XVI Gustaf of Sweden (L), Queen Silvia of Sweden, (2ndRow) Crown Princess Victoria of Sweden (R) and Crown Prince Daniel of Sweden stand at the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Swiss astronomer and co-laureate of the 2019 Nobel Prize in Physics Didier Queloz receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Crown Princess Victoria of Sweden (R) and Crown Prince Daniel of Sweden stand at the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

(1stRow) King Carl XVI Gustaf of Sweden (L), Queen Silvia of Sweden, (2ndRow) Crown Princess Victoria of Sweden (R) and Crown Prince Daniel of Sweden sit at the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Canadian-American astrophysicist, astronomer, and theoretical cosmologist and co-laureate of the 2019 Nobel Prize in Physics James Peebles receives his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Swiss astrophysicist, professor emeritus and co-laureate of the 2019 Nobel Prize in Physics Michel Mayor poses with his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Swiss astronomer and co-laureate of the 2019 Nobel Prize in Physics Didier Queloz receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Swiss astronomer and co-laureate of the 2019 Nobel Prize in Physics Didier Queloz receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Swiss astronomer and co-laureate of the 2019 Nobel Prize in Physics Didier Queloz poses with his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Swiss astronomer and co-laureate of the 2019 Nobel Prize in Physics Didier Queloz poses with his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Swiss astronomer and co-laureate of the 2019 Nobel Prize in Physics Didier Queloz poses with his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Crown Princess Victoria of Sweden's bag is pictured at the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Crown Princess Victoria of Sweden (R) and Crown Prince Daniel of Sweden sit at the start of the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Princess Sofia of Sweden (R) arrives at the Nobel 2019 awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

(LtoR) Co-laureates of the 2019 Nobel Prize in Physics Canadian-American astrophysicist, astronomer, and theoretical cosmologist James Peebles, Swiss astrophysicist, professor emeritus Michel Mayor and Swiss astronomer Didier Queloz take part in the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Canadian-American astrophysicist, astronomer, and theoretical cosmologist and co-laureate of the 2019 Nobel Prize in Physics James Peebles (L) arrives for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

(LtoR) Co-laureates of the 2019 Nobel Prize in Physics Canadian-American astrophysicist, astronomer, and theoretical cosmologist James Peebles, Swiss astrophysicist, professor emeritus Michel Mayor and Swiss astronomer Didier Queloz arrive for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Japanese chemist and co-laureate of the 2019 Nobel Prize in Chemistry Akira Yoshino (2ndL) and laureates arrive for the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

(1stRow) King Carl XVI Gustaf of Sweden (L), Queen Silvia of Sweden, (2ndRow) Crown Princess Victoria of Sweden (R) and Crown Prince Daniel of Sweden take their seats at the start of the Nobel 2019 awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Claudio BRESCIANI / TT News Agency / AFP) / Sweden OUT

US materials scientist, a solid-state physicist and co-laureate of the 2019 Nobel Prize in Chemistry John Goodenough receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

US materials scientist, a solid-state physicist and co-laureate of the 2019 Nobel Prize in Chemistry John Goodenough receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

This picture taken on December 10, 2019 shows a general view of the Concert Hall in Stockholm, Sweden at the start of the Nobel 2019 awards ceremony. (Photo by Henrik MONTGOMERY / TT NEWS AGENCY / AFP) / Sweden OUT

US materials scientist, a solid-state physicist and co-laureate of the 2019 Nobel Prize in Chemistry John Goodenough (C) arrives to receive his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

US materials scientist, a solid-state physicist and co-laureate of the 2019 Nobel Prize in Chemistry John Goodenough poses with his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

US materials scientist, a solid-state physicist and co-laureate of the 2019 Nobel Prize in Chemistry John Goodenough poses with his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

English-American chemist and co-laureate of the 2019 Nobel Prize in Chemistry M. Stanley Whittingham receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

English-American chemist and co-laureate of the 2019 Nobel Prize in Chemistry M. Stanley Whittingham receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

English-American chemist and co-laureate of the 2019 Nobel Prize in Chemistry M. Stanley Whittingham poses with his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Japanese chemist and co-laureate of the 2019 Nobel Prize in Chemistry Akira Yoshino arrives to receive his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Japanese chemist and co-laureate of the 2019 Nobel Prize in Chemistry Akira Yoshino receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Japanese chemist and co-laureate of the 2019 Nobel Prize in Chemistry Akira Yoshino receives his Nobel prize from King Carl XVI Gustaf of Sweden (R) during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Japanese chemist and co-laureate of the 2019 Nobel Prize in Chemistry Akira Yoshino poses with his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

Japanese chemist and co-laureate of the 2019 Nobel Prize in Chemistry Akira Yoshino poses with his Nobel prize during the Nobel awards ceremony at the Concert Hall in Stockholm, Sweden on December 10, 2019. (Photo by Jonathan NACKSTRAND / AFP)

US professor of medicine and co-laureate of the 2019 Nobel Prize in Physiology or Medicine William G. Kaelin receives his Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

US professor of medicine and co-laureate of the 2019 Nobel Prize in Physiology or Medicine William G. Kaelin poses with his Nobel prize during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

British physician-scientist and co-laureate of the 2019 Nobel Prize in Physiology or Medicine Sir Peter J. Ratcliffe receives his Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

British physician-scientist and co-laureate of the 2019 Nobel Prize in Physiology or Medicine Sir Peter J. Ratcliffe receives his Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

British physician-scientist and co-laureate of the 2019 Nobel Prize in Physiology or Medicine Sir Peter J. Ratcliffe receives his Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

British physician-scientist and co-laureate of the 2019 Nobel Prize in Physiology or Medicine Sir Peter J. Ratcliffe poses with his Nobel Prize during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

US professor of pediatrics, radiation oncology, biological chemistry, medicine, and oncolog and co-laureate of the 2019 Nobel Prize in Physiology or Medicine Gregg L. Semenza receives his Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

US professor of pediatrics, radiation oncology, biological chemistry, medicine, and oncolog and co-laureate of the 2019 Nobel Prize in Physiology or Medicine Gregg L. Semenza receives his Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

US professor of pediatrics, radiation oncology, biological chemistry, medicine, and oncolog and co-laureate of the 2019 Nobel Prize in Physiology or Medicine Gregg L. Semenza poses with his Nobel Prize during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

English-American chemist and co-laureate of the 2019 Nobel Prize in Chemistry M. Stanley Whittingham receives his Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonas EKSTROMER / POOL / AFP)

US materials scientist, a solid-state physicist and co-laureate of the 2019 Nobel Prize in Chemistry John Goodenough receives his Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonas EKSTROMER / POOL / AFP)

Japanese chemist and co-laureate of the 2019 Nobel Prize in Chemistry Akira Yoshino receives his Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonas EKSTROMER / POOL / AFP)

Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk (L) waits next to Austrian author and co-laureate of the 2019 Nobel Prize in Literature Peter Handke (R) before receiving her Nobel Prize during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk (L) waits next to Austrian author and co-laureate of the 2019 Nobel Prize in Literature Peter Handke (R) before receiving her Nobel Prize during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk (L) waitsin front of French-American economist and co-laureate of the 2019 Nobel Prize in Economic Sciences Esther Duflo (R) before receiving her Nobel Prize during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk receives her Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk receives her Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk receives her Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk poses with her Nobel Prize during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk (C) is applauded by Austrian author and co-laureate of the 2019 Nobel Prize in Literature Peter Handke (R) and US professor of pediatrics, radiation oncology, biological chemistry, medicine, and oncolog and co-laureate of the 2019 Nobel Prize in Physiology or Medicine Gregg L. Semenza (L) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

Polish author and co-laureate of the 2019 Nobel Prize in Literature Olga Tokarczuk (C) is applauded by Austrian author and co-laureate of the 2019 Nobel Prize in Literature Peter Handke (R) and US professor of pediatrics, radiation oncology, biological chemistry, medicine, and oncolog and co-laureate of the 2019 Nobel Prize in Physiology or Medicine Gregg L. Semenza (L) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonathan NACKSTRAND / AFP)

British physician-scientist and co-laureate of the 2019 Nobel Prize in Physiology or Medicine Sir Peter J. Ratcliffe receives his Nobel Prize from King Carl XVI Gustaf of Sweden (R) during the Award ceremony 2018 on December 10, 2018 at the Concert Hall in Stockholm, Sweden. (Photo by Jonas EKSTROMER / POOL / AFP)

People walk in front of a billboard congratulating Ethiopia's Prime Minister Abiy Ahmed for his Peace Nobel Prize, in Addis Ababa on December 10, 2019. - Ethiopian Prime Minister Abiy Ahmed hailed the role played by ex-foe Eritrea in the Nobel Peace Prize he collected on December 10 for his efforts to resolve the long-running conflict between the two neighbours. (Photo by EDUARDO SOTERAS / AFP)