12:23
Curiosity Hits Paydirt: New Clues to Life on Mars
Microbes may once have thrived in a freshwater lake on Mars, according to clues in an ancient rock.
Tying Water in a Knot
These fluid knots are like smoke rings–but made of water and shaped like a pretzel instead of a donut.
13:16
A Natural Particle Accelerator, Far Above the Planet
Closer study of the Van Allen radiation belts above Earth is providing new questions for science.
17:29
Russia Meteor Renews Focus on Asteroid Threats
Astronomers weigh in on how to keep the planet safe from near-Earth objects.
41:43
Tracking a Space Rock’s Streak Past Earth
Asteroid 2012 DA14 spans half a football field, and will whiz by the Earth a mere 17,000 miles above us–closer than many satellites.
Watch the Asteroid Flyby Live
A roundup of live streams that will let you watch the approach of asteroid 2012 DA14 online.
Meteor Steals Asteroid’s Thunder
A meteor streaks over Russia, just before Earth’s close shave with an asteroid.
16:27
Researchers Point to the Demise of the Dinosaurs
Scientists are working to refine the dates for an ancient cosmic collision.
4:50
Dung Beetles Use Cosmic GPS to Find Their Way
Dung beetles use light from the Milky Way to help them navigate at night.