Mass extinctions clearly upend the status quo. Now, our ocean floors are dominated by clams burrowed into sand and mud, the quahogs, cockles and their relatives – a scene far different from that of ...

Millions of years ago, colossal crocodiles dominated prehistoric ecosystems. Sarcosuchus, or "SuperCroc," reached 39 feet, preying on dinosaurs in Africa and South America. Purussaurus, a giant caiman ...

Fossil discoveries in Inner Mongolia have unveiled two rare specimens of an extinct genus of giant spiders, shedding light on ...

As the lush forests gave way to open grasslands, this giant ape was driven to the brink and ultimately went extinct. Never has there been a primate as big as Gigantopithecus blacki. Adults of this ...

The giant ape — an herbivore with a fondness for fruit — appeared in modern-day China about 2 million years ago. But, several hundred thousand years ago, it mysteriously went extinct ...