We'll know the future is here when cloned baby mammoths are flying around our futuristic cities in jetpacks. This is an awesome design whether or not you listen to The Skeptics' Guide to the Universe, but there are plenty of in-jokes for hardcore fans who already have their bets placed in the monkey vs bird fight.
Design is screen-printed on a high-quality American Apparel girly or unisex tee, which runs a size smaller than you may be used to. Shirt color is light blue, except in girly XXL which is in a slightly darker baby blue. Sorry about that, but the vendor didn't have the light in that color. We have no idea why.
Design by Jason Week.
Size info for girly (in US sizes and inches):
Size info for unisex (in inches):