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


EMAIL NEWSLETTER Photos and News of the Week

Get the top photos and news of the week from National Geographic News, plus occasional breaking-news alerts.

See Sample >>
Please enter a valid email address
Privacy Policy
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

Photo and Headline Widget

Put our latest news and photos on your Web page or desktop—automatically updates! See Sample