One of the most thorough studies of its kind has concluded that smoking too much reefer as a teenager is linked to significant cognitive decline. More frightening still: the effects could be permanent. Here's everything you need to know about the study's findings.

Hookworms are ghastly little creatures. Tiny, parasitic, and frighteningly invasive, these wriggling hell-spawn consistently rank among leading causes of morbidity in underdeveloped nations, abound in regions of the world suffering from poor sanitation, and have been described by various epidemiologists as "the American …

After a tearful panel, the reunited cast of Firefly sat down for a question and answer session with reporters at San Diego Comic-Con — and we were there. Here's our round-up of all the best moments from the Firefly reunion press conference.

Tonight, the pop culture frenzy known as Comic-Con begins in San Diego. Back in 2009, io9's second year at the Con, we created this very special flowchart to explain the experience. While a few of the references are out of date, you can pretty much capture the exact feeling of Comic-Con 2012 if you substitute The…

Yesterday, millions of people the world over (and a handful of astronauts, over the world) looked to the skies to watch Venus inch its way across the face of the Sun for the last time in over a century.

People have ascribed all sorts of paranormal abilities to Steve Jobs... but could he have spurred Apple to create a time machine? That's what an anonymous poster at Quora hinted, and the post was picked up by Forbes' Brian Caulfield.

Paul Thomas Anderson's untitled next film starts shooting soon, and the trickle of casting announcements is making it sound like a fantastic movie. But one question remains: Just how much did Anderson tone down the movie's Scientology references?

Soon enough we'll get to see how legendary director Bill Condon brings to life the incredibly messed-up conclusion to Stephenie Meyer's Twilight saga. Chances are, we're in for one of the all-time great "did I just see that?" scenes.

Thanks to a lunar eclipse on the longest night of the year, tonight we'll be experiencing the longest, darkest night in a very long time. It's been nearly 500 years since the last solstice lunar eclipse. Here's what you'll see.

In Virginia, General Electric is shutting down its last incandescent lightbulb factory, marking the end of an era in American illumination - and factory jobs.