Meteor Dark-Flight Captured by Skydiver

One of the folks at work discovered this amazing video; a Norwegian skydiver captured the “dark flight” of a meteor on his helmet-cam. Apparently a first, the dark flight is the period of time in between a meteor slowing down as it enters the outer atmosphere (when you see the bright streak across the sky) and when it impacts earth’s surface (more here on Wikipedia…)

UPDATE: looks like this might not have been a meteor after all :(
See Phil Plait’s wrap-up of the analysis.

P vs. NP problems

I found a couple of great videos re: “P” vs. “NP” problems in computer science; as usual the Computerphile folks put together a really nice short piece, and the second one is a talk at Harvard from a few years ago.