The weird walk of a bizarre dinosaur

Computer animation of bizarre-looking dinosaur with unusually large forearms and features that seem cobbled together from other dinosaurs.

1 dead 1 injured after crash of Virgin Galactic’s SpaceShipTwo

Virgin Galactic’s SpaceShipTwo rocket plane - a craft intended to carry tourists on suborbital flights - exploded and crashed during a test flight Friday.

Extraordinary shot of moon’s far side and Earth, from Chang’e

China’s Chang'e 5 spacecraft rounded the lunar far side earlier this week, on the return leg of its journey to the moon. It's now safely back on Earth.

2014 Antarctic ozone hole holds steady

The Antarctic ozone hole reached its annual peak size in September. The size of this year’s hole was about the same as last year's.

Star system like a wheel within a wheel

Scientists found dust and gas flowing from an outer disk around a star toward a possible second, smaller disk around a second star. Planets may be forming here!

Why do we scream?

Despite our fascination with screams, science knows relatively little about them. The psychology of screams ...

Success in the search for quiet, distant quasars

If quasars weren't so luminous, we couldn't see them so far away in space and time. But how about modest quasars, also far away? Astronomers say they've found some.

Ebola is at least 16 million years old, says study

Ebola's first documented outbreak was in 1976. But the Ebola virus family has been around for 16 to 23 million years, says new research.

Spectacular explosion at launch for Antares rocket

Watch the NASATV live broadcast of the catastrophic launch failure. The rocket was bound for the International Space Station, loaded with supplies.

Where is the missing Deepwater Horizon oil?

Researchers trace oil from the 2010 Deepwater Horizon spill to the Gulf of Mexico’s deep floor.