EDITOR’S NOTE: Call to Earth is a CNN editorial series committed to reporting on the environmental challenges facing our planet, together with the solutions. Rolex’s Perpetual Planet Initiative has ...

For 35 years, American zoologist Laurie Marker has been collecting and storing specimens in a cheetah sperm bank in Namibia, hoping conservationists never have to use them. Rwanda's biggest national ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American The extinction of the northern white rhino ...

Hopes that mankind can save the northern white rhino from extinction appeared more remote than ever this week, after scientists announced they will retire one of the last two living northern white ...

In a groundbreaking effort to save the Northern White Rhino from the brink of extinction, scientists have embarked on an ambitious mission-implanting lab-created embryos into surrogate rhinos in hopes ...

There are no known living males and neither of the two remaining northern white rhinos on Earth - a mother and her daughter living in Kenya. Photo: Courtesy. Scientists working to save the northern ...

NAIROBI (Reuters) - Scientists working to save the northern white rhinoceros from extinction plan to implant its artificially developed embryos in another, more abundant rhino subspecies in Kenya ...

Grief for an animal at the end of its life is unlike any other emotion. It cleaves a depthless void that feels empty and hollow. It’s a feeling that animal keepers and caretakers know well, but it’s ...

The world's last male northern white rhino, Sudan, has died after "age-related complications," researchers announced Tuesday, saying he "stole the heart of many with his dignity and strength." A ...