ARCHIVE - 15.03.2018, Congo, Kinshasa: An adult bonobo stands in the Lola Ya Bonobo Sanctuary Park. The park's employees deal with orphaned monkeys threatened by bushmeat trade and deforestation. They solve conflicts through sex and are among our closest relatives. But the bonobos in the Congo are threatened by bushmeat trade and deforestation. (To dpa "Dangerous bonobos in Congo make love instead of war") Photo: Kate Bartlett / dpa | usage worldwide

ARCHIVE - 15.03.2018, Congo, Kinshasa: S? Arrive, a "surrogate mother" for bonobos, is hugged in the Lola Ya Bonobo Sanctuary Park by bonobo boys orphaned by bushmeat trafficking. They solve conflicts through sex and are among our closest relatives. But the bonobos in the Congo are threatened by bushmeat trade and deforestation. (To dpa "Dangerous bonobos in Congo make love instead of war") Photo: Kate Bartlett / dpa | usage worldwide

FILED - 15 March 2018, Congo, Kinshasa: S'Arrive, a replacement 'mother' for bonobos, receives a lot of attention from young bonobos at Lola Ya Bonobo Sanctuary Park. The park's employees care for orphaned apes, which are endangered because of the meat trade and deforestation. Bonobos resolve conflicts through sex and are closely related to humans. Photo: Kate Bartlett/dpa

FILED - 15 March 2018, Congo, Kinshasa: S'Arrive, a replacement 'mother' for bonobos, receives a lot of attention from young bonobos at Lola Ya Bonobo Sanctuary Park. The park's employees care for orphaned apes, which are endangered because of the meat trade and deforestation. Bonobos resolve conflicts through sex and are closely related to humans. Photo: Kate Bartlett/dpa

FILED - 15 March 2018, Congo, Kinshasa: A bonobo eats a papaya at Lola Ya Bonobo Sanctuary Park. The park's employees care for orphaned apes, which are endangered because of the meat trade and deforestation. Bonobos resolve conflicts through sex and are closely related to humans. Photo: Kate Bartlett/dpa

FILED - 15 March 2018, Congo, Kinshasa: An adult bonobo stands in Lola Ya Bonobo Sanctuary Park. The park's employees care for orphaned apes, which are endangered because of the meat trade and deforestation. Bonobos resolve conflicts through sex and are closely related to humans. Photo: Kate Bartlett/dpa

ARCHIVE - 15.03.2018, Congo, Kinshasa: A bonobo family is looking for food at the Lola Ya Bonobo Sanctuary Park. The park's employees deal with orphaned monkeys threatened by bushmeat trade and deforestation. They solve conflicts through sex and are among our closest relatives. But the bonobos in the Congo are threatened by bushmeat trade and deforestation. (To dpa "Dangerous bonobos in Congo make love instead of war") Photo: Kate Bartlett / dpa | usage worldwide

ARCHIVE - 15.03.2018, Congo, Kinshasa: A bonobo eating a papaya at the Lola Ya Bonobo Sanctuary Park. The park's employees deal with orphaned monkeys threatened by bushmeat trade and deforestation. They solve conflicts through sex and are among our closest relatives. But the bonobos in the Congo are threatened by bushmeat trade and deforestation. (To dpa "Dangerous bonobos in Congo make love instead of war") Photo: Kate Bartlett / dpa | usage worldwide

ARCHIVE - 15.03.2018, Congo, Kinshasa: A bonobo eating a papaya at the Lola Ya Bonobo Sanctuary Park. The park's employees deal with orphaned monkeys threatened by bushmeat trade and deforestation. They solve conflicts through sex and are among our closest relatives. But the bonobos in the Congo are threatened by bushmeat trade and deforestation. (To dpa "Dangerous bonobos in Congo make love instead of war") Photo: Kate Bartlett / dpa | usage worldwide

ARCHIVE - 15.03.2018, Congo, Kinshasa: A bonobo swims in a lake in the Lola Ya Bonobo Sanctuary Park. The park's employees deal with orphaned monkeys threatened by bushmeat trade and deforestation. They solve conflicts through sex and are among our closest relatives. But the bonobos in the Congo are threatened by bushmeat trade and deforestation. (To dpa "Dangerous bonobos in Congo make love instead of war") Photo: Kate Bartlett / dpa | usage worldwide

ARCHIVE - 15.03.2018, Congo, Kinshasa: A bonobo eating a papaya at the Lola Ya Bonobo Sanctuary Park. The park's employees deal with orphaned monkeys threatened by bushmeat trade and deforestation. They solve conflicts through sex and are among our closest relatives. But the bonobos in the Congo are threatened by bushmeat trade and deforestation. (To dpa "Dangerous bonobos in Congo make love instead of war") Photo: Kate Bartlett / dpa | usage worldwide

ARCHIVE - 15.03.2018, Congo, Kinshasa: A bonobo eating a papaya at the Lola Ya Bonobo Sanctuary Park. The park's employees deal with orphaned monkeys threatened by bushmeat trade and deforestation. They solve conflicts through sex and are among our closest relatives. But the bonobos in the Congo are threatened by bushmeat trade and deforestation. (To dpa "Dangerous bonobos in Congo make love instead of war") Photo: Kate Bartlett / dpa | usage worldwide

ARCHIVE - 15.03.2018, Congo, Kinshasa: S? Arrive, a "surrogate mother" for bonobos, is hugged in the Lola Ya Bonobo Sanctuary Park by bonobo boys orphaned by bushmeat trafficking. They solve conflicts through sex and are among our closest relatives. But the bonobos in the Congo are threatened by bushmeat trade and deforestation. (To dpa "Dangerous bonobos in Congo make love instead of war") Photo: Kate Bartlett / dpa | usage worldwide

ARCHIVE - 15.03.2018, Congo, Kinshasa: S? Arrive, a "surrogate mother" for bonobos, is hugged in the Lola Ya Bonobo Sanctuary Park by bonobo boys orphaned by bushmeat trafficking. They solve conflicts through sex and are among our closest relatives. But the bonobos in the Congo are threatened by bushmeat trade and deforestation. (To dpa "Dangerous bonobos in Congo make love instead of war") Photo: Kate Bartlett / dpa | usage worldwide

FILED - 15 March 2018, Congo, Kinshasa: A bonobo swims in a lake at Lola Ya Bonobo Sanctuary Park. The park's employees care for orphaned apes, which are endangered because of the meat trade and deforestation. Bonobos resolve conflicts through sex and are closely related to humans. Photo: Kate Bartlett/dpa

FILED - 15 March 2018, Congo, Kinshasa: A bonobo family searches for food at Lola Ya Bonobo Sanctuary Park. The park's employees care for orphaned apes, which are endangered because of the meat trade and deforestation. Bonobos resolve conflicts through sex and are closely related to humans. Photo: Kate Bartlett/dpa

FILED - 15 March 2018, Congo, Kinshasa: A bonobo eats a papaya at Lola Ya Bonobo Sanctuary Park. The park's employees care for orphaned apes, which are endangered because of the meat trade and deforestation. Bonobos resolve conflicts through sex and are closely related to humans. Photo: Kate Bartlett/dpa

FILED - 15 March 2018, Congo, Kinshasa: A bonobo eats a papaya at Lola Ya Bonobo Sanctuary Park. The park's employees care for orphaned apes, which are endangered because of the meat trade and deforestation. Bonobos resolve conflicts through sex and are closely related to humans. Photo: Kate Bartlett/dpa

FILED - 15 March 2018, Congo, Kinshasa: A bonobo eats a papaya at Lola Ya Bonobo Sanctuary Park. The park's employees care for orphaned apes, which are endangered because of the meat trade and deforestation. Bonobos resolve conflicts through sex and are closely related to humans. Photo: Kate Bartlett/dpa

FILED - 15 March 2018, Congo, Kinshasa: S'Arrive, a replacement 'mother' for bonobos, receives a lot of attention from young bonobos at Lola Ya Bonobo Sanctuary Park. The park's employees care for orphaned apes, which are endangered because of the meat trade and deforestation. Bonobos resolve conflicts through sex and are closely related to humans. Photo: Kate Bartlett/dpa