Ancient proteins retrieved from a Tyranosaurus rex fossil prove that birds, not reptiles, are dinosaurs' closest living relatives, a new study says.

A newly released atlas of Hubble images could be an interstellar Rorschach test, with galaxy collisions resembling everything from sea life to dental tools.

Earth's high-altitude winds may be changing due to global warming, possibly making it easier for more powerful storms to form, a new study says.

At least one species of octopus has complex sex habits that include using mimicry and guile, a new study has found.

Insect infestations are turning forests in British Columbia into net carbon sources, according to new research that may force researchers to revise climate change models.

The first dogs specially trained to detect the polycarbonate used in DVDs and CDs have helped detect nearly 2 million illegal discs, authorities say.

Archaeologists have unearthed the remains of a 2,000-year-old pre-Colombian settlement near Bogota, a find that may reveal information about the area's mysterious ancient inhabitants.

An ancient Greek tomb once thought to have been that of Alexander's father is more recent than thought and may contain treasures belonging to Alexander himself, experts say.

Hundreds of prehistoric dogs found buried throughout the Southwest show that canines played a key role in the spiritual life of ancient Americans, new research suggests.