Photo: Dinosaurs' Rise Was Slow, Not "Lucky Break," New Fossils Suggest



A quartet of dinosaurs and dino predecessors roam side-by-side during the late Triassic, about 220 million years ago, in this artist's rendering.

A newly discovered dino relative called Dromomeron romeri (lower left) is among a trove of fossils found in New Mexico that suggests that the rise of dinosaurs was gradual rather than sudden.

Illustration by Donna Braginetz, © Science


NEWS FEEDS    After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed. After installing a news reader, click on this icon to download National Geographic News's XML/RSS feed.

Get our news delivered directly to your desktop—free.
How to Use XML or RSS

ADVERTISEMENT

NATIONAL GEOGRAPHIC'S PHOTO OF THE DAY

50 Drives of a Lifetime

Listen to your favorite National Geographic news daily, anytime, anywhere from your mobile phone. No wires or syncing. Download Stitcher free today.