We're loving this week's Baarbarian-inked This Week in the Future illustration. It's got everything you'd want in a t-shirt: obese apes, aggressive polar bears, passive observing rattlesnakes, guerrilla artwork. And you can win this very t-shirt, for free! Just follow the instructions below.

Want to win this animal-centric Baarbarian illustration on a T-shirt? It's easy! The rules: Follow us on Twitter (we're @PopSci) and retweet our This Week in the Future tweet. One of those lucky retweeters will be chosen to receive a custom T-shirt with this week's Baarbarian illustration on it, thus making the winner the envy of their friends, coworkers and everyone else with eyes. (Those who would rather not leave things to chance and just pony up some cash for the t-shirt can do that here.) The stories pictured herein:

And don't forget to check out our other favorite stories of the week: