The Jurassic period is the second of the three divisions of the Mesozoic era, "The Age of Reptiles." The Jurassic lasted for 64 million years, from about 208 to 144 million years ago. The period is named for rock strata found in the Jura...

In geologic time, the Jurassic Period—the middle of three geologic periods in the Mesozoic Era—spans the time from roughly 206–208 million years ago (mya) to approximately 146 mya. The Jurassic Period contains three geologic...

The Jurassic Period is a major unit of the geologic timescale that extends from about 199.6 ± 0.6 Ma (million years ago) to 145.4 ± 4.0 Ma, the end of the Triassic to the beginning of the Cretaceous. As with other geologic periods, the rock beds that...

Dinosaurs shared the Earth for millions of years with the species that were their ancestors, a new study concludes.Dinosaurs arose in the Late Triassic, between 235 million and 200 million years ago, and came to dominate the planet in the Jurassic, 200 million to 120...

Scientists unveiled bones from two 82-foot behemoths they said were the largest dinosaurs ever found in Australia.Fossilized bones from the two titanosaurs were found in 2005 and 2006 by ranchers near the town of Eromanga, 600 miles west of the Queensland state capital, Brisbane.They were...

The Tyrannosaurus Rex would have been able to outrun soccer star David Beckham, according to research published Wednesday.Previously experts argued the 18-foot-tall T-Rex's bulk would have meant it was a slow-moving scavenger, but new calculations reached using a supercomputer suggest the T-Rex could run up...

Tracks from half a dozen species of dinosaurs turned up in a southern Utah area popular with ATV riders. An area the size of a football field was closed to protect thousands of three-toed and other tracks, according to the Bureau of Land Management, which...