Dinosaurs

Scientists in Utah say they have discovered Tyrannosaurus rex's "great-uncle," a massive predator with a thick skull and large teeth dubbed the "king of gore." Bones of the 24-foot (7.3-meter) -long dinosaur, slightly smaller than T.

A series of tracks in Oklahoma reveal where a dinosaur most likely slipped and caught itself before continuing on

New research shows freshwater organisms fared better than others after the most recent extinction event

High rates of tooth growth helped sauropods eat vegetation, scientists say

A project to revive long-gone species is a sideshow to the real extinction crisis

Dinosaurs — or at least their ancestors — may have gotten an earlier start than once believed

A nesting site has yielded the earliest known organic remains of a terrestrial vertebrate

Once considered beyond the reach of science, insights into the love lives of these extinct giants are emerging

A dating technique has pinned down four volcanic eruptions that may have triggered the extinction event that cleared the way for dinosaurs to dominate Earth for the next 135 million years

Two-winged flight followed the emergence of avian ancestors

Heat radiating from an asteroid imparts a tiny push to the rock, meaning that we could subtly steer an asteroid by changing its reflectance. John Matson reports

While most of its relatives perished with the dinosaurs, the molelike creature lived 45 million years longer than expected