The whales are newly listed as critically endangered by the International Union for Conservation of Nature.
Diego has had one very busy life, helping to save the Chelonoidis hoodensis from extinction.
Experts estimate that fewer than 80 Sumatran rhinos remain on Earth, most of them in Indonesia.
Poaching is a multi-billion dollar industry run by gangs. Meet the women waging a war against it.
Japan’s National Museum of Nature and Science said there is no record of this happening before in the country.
“Right now, the sky is falling,” warns a National Marine Fisheries Service scientist.