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写真 | 2021年 10月 22日 00:20 JST

The world's last two northern white rhinos

Najin (R) and her daughter Fatu, the last two northern white rhinos, graze near their enclosure at the Ol Pejeta Conservancy in Laikipia National Park, Kenya. One of the world's last two northern white rhinos, a mother and her daughter, is being retired from a breeding program  aimed at saving the species from extinction.   

REUTERS/Thomas Mukoya

Najin (R) and her daughter Fatu, the last two northern white rhinos, graze near their enclosure at the Ol Pejemore

Najin (R) and her daughter Fatu, the last two northern white rhinos, graze near their enclosure at the Ol Pejeta Conservancy in Laikipia National Park, Kenya. One of the world's last two northern white rhinos, a mother and her daughter, is being retired from a breeding program aimed at saving the species from extinction. REUTERS/Thomas Mukoya
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Najin, 32, (pictured at right) is the mother of Fatu who is now the only donor left in the program, which aims to implant artificially developed embryos into another more abundant species of rhino in Kenya. 
    REUTERS/Thomas Mukoya

Najin, 32, (pictured at right) is the mother of Fatu who is now the only donor left in the program, which aimsmore

Najin, 32, (pictured at right) is the mother of Fatu who is now the only donor left in the program, which aims to implant artificially developed embryos into another more abundant species of rhino in Kenya. REUTERS/Thomas Mukoya
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There are no known living males and neither of the two remaining northern white rhinos can carry a calf to term.     REUTERS/Thomas Mukoya

There are no known living males and neither of the two remaining northern white rhinos can carry a calf to termore

There are no known living males and neither of the two remaining northern white rhinos can carry a calf to term. REUTERS/Thomas Mukoya
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Northern white rhinos, which are actually grey, used to roam freely in several countries in east and central Africa, but their numbers fell sharply due to widespread poaching for their horns.     REUTERS/Baz Ratner

Northern white rhinos, which are actually grey, used to roam freely in several countries in east and central Amore

Northern white rhinos, which are actually grey, used to roam freely in several countries in east and central Africa, but their numbers fell sharply due to widespread poaching for their horns. REUTERS/Baz Ratner
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A child walks past the headstone of Sudan, the last male northern white rhino, at the Rhino Cemetery at the Ol Pejeta Conservancy in Laikipia National Park, Kenya. REUTERS/Thomas Mukoya

A child walks past the headstone of Sudan, the last male northern white rhino, at the Rhino Cemetery at the Olmore

A child walks past the headstone of Sudan, the last male northern white rhino, at the Rhino Cemetery at the Ol Pejeta Conservancy in Laikipia National Park, Kenya. REUTERS/Thomas Mukoya
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A Biorescue team led by researchers from the Leibniz Institute for Zoo and Wildlife Research in Germany has been racing against time to save the world's most endangered mammal. "The team has reached the decision to retire the older of the two remaining females, 32-year-old Najin, as a donor of egg cells," Biorescue said in a statement, citing ethical considerations.  

  REUTERS/Thomas Mukoya.

A Biorescue team led by researchers from the Leibniz Institute for Zoo and Wildlife Research in Germany has bemore

A Biorescue team led by researchers from the Leibniz Institute for Zoo and Wildlife Research in Germany has been racing against time to save the world's most endangered mammal. "The team has reached the decision to retire the older of the two remaining females, 32-year-old Najin, as a donor of egg cells," Biorescue said in a statement, citing ethical considerations. REUTERS/Thomas Mukoya.
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Najin's advanced age, and signs of illness, were also taken into account, they said.   

REUTERS/Thomas Mukoya

Najin's advanced age, and signs of illness, were also taken into account, they said. REUTERS/Thomas Mukoya

Najin's advanced age, and signs of illness, were also taken into account, they said. REUTERS/Thomas Mukoya
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Scientists hope to implant embryos made from the rhinos' egg cells and frozen sperm from deceased males into surrogate mothers.   REUTERS/Baz Ratner

Scientists hope to implant embryos made from the rhinos' egg cells and frozen sperm from deceased males into smore

Scientists hope to implant embryos made from the rhinos' egg cells and frozen sperm from deceased males into surrogate mothers. REUTERS/Baz Ratner
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"We have been very successful with Fatu... So far we have 12 pure northern white rhino embryos," David Ndeereh, the acting deputy director for research at the Wildlife Research and Training Institute, a Kenyan state agency, told Reuters. "We are very optimistic that the project will succeed."   

 REUTERS/Baz Ratner

"We have been very successful with Fatu... So far we have 12 pure northern white rhino embryos," David Ndeerehmore

"We have been very successful with Fatu... So far we have 12 pure northern white rhino embryos," David Ndeereh, the acting deputy director for research at the Wildlife Research and Training Institute, a Kenyan state agency, told Reuters. "We are very optimistic that the project will succeed." REUTERS/Baz Ratner
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The team hopes to be able to deliver its first northern white rhino calf in three years and a wider population in the next two decades.     REUTERS/Thomas Mukoya

The team hopes to be able to deliver its first northern white rhino calf in three years and a wider populationmore

The team hopes to be able to deliver its first northern white rhino calf in three years and a wider population in the next two decades. REUTERS/Thomas Mukoya
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