Scientists say a tortoise discovered in 2019 on the Galapagos Islands belongs to a species considered extinct more than 100 years ago. The single female tortoise belongs to the species Chelonoidis ...

While many plants and animals are lost to us forever, this little bird has just been very good at hiding. Here's how scientists were able to find it again.

If an animal hasn't been seen in the wild for more than fifty years, it's technically extinct. But academic criteria haven't stopped some disappeared species from reappearing, confounding official ...

Thirty beluga whales were still alive on Oct. 10, despite Canada's Marineland park threatening to euthanize them if it did ...