Viking Sunstone Guided Ships in Cloudy Weather?
No such artifacts have been recovered from Viking shipwrecks (yet?), but the concept is pretty cool:
To avoid getting lost on their voyages across the North Atlantic 1,000 years ago, Vikings relied on the sun to determine their heading. (This was long before magnetic compasses had been invented.) But cloudy days could have sent their ships dangerously off course, especially during the all-day summer sun at those far-north latitudes. The Norse sagas mention a mysterious “sunstone” used for navigation. Now a team of scientists claims that the sunstones could have been calcite crystals and that Vikings could have used them to get highly accurate compass readings even when the sun was hidden.
7 Billion: How Did We Get So Big So Fast?
Very cool video by npr…
Amazing HD time-lapse photos taken from the ISS. Definitely watch this full-screen…
Herman Cain’s Campaign Promises with Mike Tyson
Holy crap, Mike Tyson made a video making fun of Herman Cain!