These GIFs are like staring into a rift in time

These GIFs of endless time-loops moving across cityscapes from Shanghai-based artist Fong Qi Wei are astonishingly beautiful. But they also offer an interesting way to think about time, letting the viewer see the past, the present, and the future all at once. » 3/05/14 12:48pm 3/05/14 12:48pm

How does science define a year?

It's been a year since Joe Hanson took his fantastic science tumblr, It's Okay to be Smart, to YouTube. To celebrate, his latest episode takes a look at the ways humans experience years biologically, and how we define them astronomically. » 1/30/14 1:13pm 1/30/14 1:13pm

Is time real?

It's more than some half-baked question from your college days. Time and its "real"-ness are, in fact, major considerations in fields like physics and philosophy. But then, what does that question – Is time real? – even mean? Theoretical physicist Sean Carroll gets down to brass tacks on time, reality, and how we… » 10/17/13 1:08pm 10/17/13 1:08pm

Everything you need to know to catch tonight's Leonid meteor shower

This year's Leonid meteor shower peaks during the pre-dawn hours of Saturday, November 17th, and it's shaping up to be a beautiful night for stargazing. According to NASA, tonight's shower could be one of the best Leonid displays in years. Here's everything you need to know to spot as many meteors as possible. » 11/16/12 1:00pm 11/16/12 1:00pm

Everything you need to know to catch this weekend's Orionid meteor…

The Orionid meteor shower — one of the year's most spectacular natural light shows — is upon us. This weekend, Earth will plow through a dense stream of celestial debris given off by Halley's Comet. These fragments of Halley will collide with the planet's atmosphere at speeds approaching 150,000 miles per hour, setting … » 10/19/12 11:12am 10/19/12 11:12am

Understanding the leap second that crashed the Internet

You may have noticed yesterday that io9 — and the rest of the Gawker network — went down for several minutes yesterday. Other sites, including Reddit, 4Chan, LinkedIn, The Pirate Bay, Yelp, and Meetup, had lengthy outages, all at the hands of one tiny unit of time. But how did a single leap second fell these websites? » 7/01/12 7:00am 7/01/12 7:00am