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Talk to the Man Who Drives the $2.6 Billion-Dollar Mars Curiosity Rover

Matt Heverly has one of the coolest jobs in the Solar System: he drives rovers. On Mars. He drove NASA's Opportunity rover for four years and now he's getting ready for the biggest mission in the history of NASA's planetary exploration—driving the $2.6-billion car-sized Curiosity rover after it lands this Sunday (I… »8/02/12 2:30pm8/02/12 2:30pm

Orwell, Guthrie, and No Sleep: How Wikipedia's MVP Got to One Million Edits

Just about everyone you know uses Wikipedia. But that deep library of information—nearly 4 million entries—didn't get there by accident. In fact, a surprising number of them came from Justin Knapp, who is the first person to make more than one million edits on the site. We've got him here live taking your questions. »7/25/12 11:00am7/25/12 11:00am

What It's Like To Fly A Top-Secret Spy Plane: A Live Conversation With A Badass Pilot

The SR-71 Blackbird remains an icon of American aerospace engineering to this day. Its speed and operating ceiling are unrivaled. However, it did not simply spring forth fully-formed from the head of "Kelly" Johnson—it spent years in development as the A-12 Oxcart being flown by an elite group of Air Force pilots.… »6/28/12 11:30am6/28/12 11:30am