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Geography

Scientists find the oldest known projectile points in the Americas

Archaeologists have uncovered projectile points in Idaho that are thousands of years older than any previously found in the Americas. This helps fill in the...

Early humans may have first walked upright in the trees

Human bipedalism – walking upright on two legs – may have evolved in trees, and not on the ground as previously thought, according to...

Scientists reveal the diets of early dinosaurs

The earliest dinosaurs included carnivorous, omnivorous and herbivorous species, according to a team of paleobiologists.

Oxygen could exist in Earth’s solid inner core, shows study

Oxygen can exist in the solid inner core, which provides key constraints for further understanding of the formation process and evolution history of the Earth's core.

Spinosaurus, the largest predatory dinosaur, wasn’t underwater hunter, shows study

Spinosaurus, the largest known predatory dinosaur to roam the Earth, was adapted for hunting along shorelines instead of venturing deep underwater.

Precise solar observations fed millions in ancient Mexico

Before the Spanish arrival in 1519, the Basin of Mexico’s agricultural system fed a population that was extraordinarily large for the time. 

How this hell planet got so hot

A new study sheds light on how the “hell planet” got so devilishly hot and how other worlds might become too toasty for life.

The Southern Hemisphere is stormier than the Northern, and we finally know why

For centuries, sailors who had been all over the world knew where the most fearsome storms of all lay in wait: the Southern Hemisphere.

Mars is not a dead planet. It’s more active than previously thought

Mars, like Earth and Venus, possesses an active interior, which challenges current views on the evolution of the red planet.

How Tyrannosaurus rex got its speed and endurance

How did Tyrannosaurus rex catch its food? Looking at T. rex’s fossilized skull, the answer may seem obvious: monstrous jaws and sharp teeth capable of...