[http://youtu.be/UIovk_LgHRA] (YouTube link)Ross Exton of the Live Science Team shows us a magic trick, with a science lesson on how it really works. You can put completely transparent glass in completely transparent wat...

Just how hard is it to misplace an entire civili...  ...rld. And then, somehow, their entire civilization disappeared between the years 800 and 900 AD. There are some...