The $72 Amazon Prime Deal is Live, Even For Existing Subscribers!

As promised, Amazon is selling 1-year memberships to Amazon Prime for just $72 right now (down from $99) in celebration of the 72nd Annual Golden Globes. Plus, everyone can also stream the award-winning Transparent for free today, even without a membership. I've watched it, and can't think of a better way to spend… »1/23/15 11:59pm1/23/15 11:59pm

Why can we see through glass but not other solids? Let this awesome video explain

It seems like a simple enough question - why are some materials transparent while others are opaque? But, as this video from the University of Nottingham's Sixty Symbols project explains, a lot of the most common explanations you get are fundamentally wrong. Watch a professional scientist recoil in horror at the… »2/20/11 10:30pm2/20/11 10:30pm