The dinosaurs ruled Earth for around 165 million years, evolving from tiny Triassic reptiles into some of the most gigantic and specialized creatures ever seen in natural history . Early dinosaur ...

Dinosaurs had such an immense impact on Earth that their sudden extinction led to wide-scale changes in landscapes—including the shape of rivers—and these changes are reflected in the geologic record, ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. But we mammals did survive. The characteristics we now equate with “mammalness” are ...

An assembly framework and video to learn about about dinosaurs, paleontology, and the ancient natural history of Earth.

Researchers are uncovering the evolutionary steps that set the stage for dinosaurs to rule the planet Amy McDermott, PNAS Front Matter Paleontologists have found early examples of theropods, the group ...

Sixty-six million years ago, a huge asteroid famously hit the Earth, causing the extinction of dinosaurs and about half of ...

Scientists discovered three new mammal species that survived in Alaska’s ancient Arctic during the age of dinosaurs.