Every creature that has disappeared leaves behind more than just a memory they leave lessons about ecosystems, extinction ...

Earth has witnessed a parade of unique creatures over millions of years, from predators to ancient giants. These creatures, once rulers of land, sea, and sky. They left behind fossils which can be ...

The dodo bird vanished more than 300 years ago, but its story still sparks curiosity. Native to just one island and wiped out in just a few decades, the dodo has become a symbol of extinction and ...

A sleepy koala may seem worlds apart from a giant Ice Age predator, but scientists have uncovered the first molecular ...

MELBOURNE, Australia -- Almost 100 years after its extinction, the Tasmanian tiger may live once again. Scientists want to resurrect the striped carnivorous marsupial, officially known as a thylacine, ...

Kelli Bender is the Pets Editor at PEOPLE. She has been working at PEOPLE since 2013. Her work has previously appeared on MTV, The Frisky, Vice, and Best Friends Magazine. Curiosity Stream/YouTube ...