Australian Finches Have Different Colored Bills Due To A Few Genes That Dictate How They Process Yellow Pigments From Their Diet. Story by Emily Chan • 3w.

Color-changing security strips A worker at Crane & Co. points out the security strip on a new $100 bill Of course, glitches like that can happen when trying innovative techniques.

New $100 bill features more color, 3-D security ribbon September 25, 2013 / 10:22 PM EDT / AP FORT WORTH, Texas A glitzier, high-tech version of America's $100 bill is rolling off the presses and ...