What Are the Odds That You Might See a Meteoroid While Skydiving?

You've seen the footage of a rock falling past a skydiver. It looks like this particular object might be a rock accidentally packed in his parachute. So we've done the statistical analysis to figure out what the real chances are that a skydiver would eventually see a meteoroid. » 4/09/14 11:25pm 4/09/14 11:25pm

An aluminum slug melts and levitates at the same time

Run an alternating current through a coiled length of copper and you'll create a levitation cylinder. Drop a bar of aluminum in and you've got yourself some hovering metal. But leave the metal there too long... » 4/05/14 2:00pm 4/05/14 2:00pm

Your Afternoon Catharsis: Liquid Droplets Coalescing in Slow Motion

You've probably seen two beads of liquid coalesce hundreds of times in your life. Maybe thousands. But we're willing to bet you've never seen them do it in slow motion. » 4/04/14 3:34pm 4/04/14 3:34pm

13 Unexpected Sources of Energy that Could Save the World

If humans are going to keep living in the style to which we're accustomed, we need to find alternatives for fossil fuels. Partly that's because we need to reduce pollution — and partly because those fossil fuels are going to run out. But alternative forms of energy may look a lot weirder than you think. » 3/31/14 1:02pm 3/31/14 1:02pm

It Seems More and More Certain That We Live in a Multiverse

Last week, physicists announced that they'd discovered evidence of gravitational waves in the early universe, which makes it more likely that our universe began with a bang and inflated from there. But that also means a whole host of other things, including possible multiverses. » 3/25/14 3:59pm 3/25/14 3:59pm