The asteroid impact fundamentally reset the nature of Earth’s tropical rainforests, decreasing diversity at first and making them permanently darker.
Holes found in ancient clams reveal that octopuses have been drilling into their prey for at least 25 million years longer than was previously known.
A drop in CO2 levels helped massive plant eaters called sauropodomorphs trek from South America to Greenland 214 million years ago, says a new study.
The weakening of Earth's magnetic field beginning around 42,000 years ago correlates with a cascade of environmental crises, scientists say.
Mammoths evolved to handle the cold over hundreds of thousands of years and North America may been home to a hybrid species, a new study finds.
Evidence of early life may be harder to preserve than pseudofossils — structures that form abiotically but resemble living remnants.
Right up until 66 million years ago, the sea was a teeming evolutionary laboratory with a small, agile, razor-toothed mosasaur patrolling the waters.
In 1971, a scientist argued for a landbound Brontosaurus instead of a swampy swimmer. Recent evidence comes from studies of its ancient environment.
20-million-year-old tunnels unearthed in Taiwan may have been home to creatures that ambushed prey similar to today’s monstrous bobbit worms.
Preserved pieces of backbone suggest that megalodon sharks were about 2 meters long at birth.