Dinosaurs weren't in decline when an asteroid smashed into Earth and wiped them out, scientists say. Instead, the idea that dinosaur diversity was declining before the asteroid struck 66 million years ...

The extinction of the dinosaurs has been a hotly debated topic for decades, and whether it was an asteroid, a volcanic eruption or even poisonous plant species. But researchers have found hard ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Sixty-six million ...

Geological clues suggest that the space rock that created Chicxulub crater was a carbonaceous chondrite meteorite. Around 66 million years ago, an asteroid slammed into the Yucatan Peninsula and ...

A study adds strong evidence to the hypothesis that the deadly rock came from a family of objects that originally formed well beyond the orbit of the planet Jupiter. A study adds strong evidence to ...

Sixty-six million years ago, the story of life on Earth took a dramatic turn when an asteroid collided with what’s now the Yucatán Peninsula in Chicxulub, Mexico. The aftereffects of the collision ...

The idea that dinosaurs were already in decline before an asteroid wiped most of them out 66 million years ago may be explained by a worsening fossil record from that time rather than a genuine ...

Newly dated fossils from New Mexico challenge the idea that dinosaurs were in decline—and suggest instead they had formed flourishing communities. Alamosaurus was one of the last dinosaurs from ...

The idea that dinosaurs were already in decline before an asteroid wiped most of them out 66 million years ago may be explained by a worsening fossil record from that time rather than a genuine ...

A depiction of a large asteroid impacting Earth some 66 million years ago. Credit: Mark Garlick / Science Photo Library / Getty Images A menacing asteroid, some six miles wide, triggered Earth's last ...

The discovery of predatory dinosaurs in marine sediments in Morocco suggests life was abundant and diversifying at the end of the Cretaceous period. When you purchase through links on our site, we may ...