Stunning Timelapses Show The World's Largest Cities From The Air

The greatest cities on Earth are always in motion. Their bustling activity forms a great collective organism, whose shape changes over time. So there's a good reason why we're all fascinated by timelapses of cities — and there's nothing cooler than timelapses of aerial footage. See the world's biggest cities in a… » 3/19/15 3:05pm 3/19/15 3:05pm

How To Make Smoke Rings With A Water Bottle, A Balloon, And Incense

In high school, I once tried to build a smoke-ring-generating vortex cannon out of a five-gallon paint bucket, a t-shirt, and some dry ice. My contraption was a letdown. It produced weak, wispy rings, and did so inconsistently. This video shows how to build a DIY vortex cannon that actually works. » 3/11/15 2:00pm 3/11/15 2:00pm

Slug Slime Is A Liquid Crystal And It's Actually Pretty Incredible

You do not become a forest-floor-creeping mollusk on good looks alone; to crawl effectively, you need something with which to lubricate your wriggling, slimy, slithering self. Mucus, secreted in abundance from your entire body, is just the ticket. But slug slime is good for a lot more than whole-body lubrication. » 3/03/15 7:00pm 3/03/15 7:00pm

How To Hack Your Street Lamps Like An Astronaut

A bright street lamp can ruin a night of stargazing, saturating your retinas with light and washing out the comparatively faint glow of constellations and meteors. Here's a handy hack you can use the next time you need to put one temporarily (and reversibly) out of business, courtesy of NASA astronaut Don Pettit. » 2/19/15 3:55pm 2/19/15 3:55pm