When an animal moves from the endangered species list to being officially extinct, it's undeniably a sad day. The creature has gone the way of the dinosaur and the dodo, but on occasion, scientists ...

So many humans live on Earth, it’s hard to imagine there are animals we haven’t seen for years, decades, or even millions of ...

Over a million species of animals and plants are now hanging by a thread, more than ever before in human history, says the International Science-Policy Platform on Biodiversity and Ecosystem Services ...