Why is this squirrel purple?

http://www.gizmodo.com.au/2012/02/why-is-this-squirrel-purple/

/ fluid Tyrian /

Science magazine: Breakthroughs of the Year, 2011 (video - maybe)

Video wouldn't play when I looked.  You might have better luck.  Worth a look either way.

Update: video working now.

http://m.sciencemag.org/site/special/btoy2011/

Ancient Earth got a galactic golden shower

http://www.gizmodo.com.au/2011/09/ancient-earth-got-a-galactic-golden-shower/