This Week in the Future, June 20-24, 2011

Campfires: Good for iPhones, bad for the (anthropomorphic, overheated) Earth. At least in its sweaty state, we can see its magnetic field.

Want to win this particularly trippy 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 some of our other favorite stories of the week: