Resurrecting extinct animals is both “exhilarating and terrifying ... elephants have a two-year gestation period. If you mean 100-percent mammoth, with all mammoth genes and behaviors ...

These 10 incredible animals once roamed Earth’s oceans, skies, and forests—but now they’re gone forever, victims of extinction caused by nature, human impact, and time itself. [extinct animals] [lost ...

There once used to be up to 10,000 grizzly bears roaming California, but they eventually disappeared from the state as humans ...

Scientists revisited tracks made by a shorebird, a lizard, a cat-like predator and some sort of large herbivore at what is now John Day Fossil Beds National Monument ...

BBC Bitesize takes a look at four animals that were believed to be extinct – until they weren ... weigh 100kg and has a life span of around 100 years. When a large fish with blue, scaly ...