Alt-week 12.21.13: Rainbow sun, edible batteries and the world's toughest encryption cracked by a microphone

Alt-week takes a look at the best science and alternative tech stories from the last seven days.

via Tech News Headlines - Yahoo News http://www.engadget.com/2013/12/21/alt-week-12-21-13?ncid=txtlnkusaolp00000589