Sharp-eyed Android-using PopSci fans may have already noticed that our reader app, previously only on iOS, is now available on Android. We're excited to offer this fast, easy and free way to stay up to date on all the PopSci.com action to our friendly Androids. Hope you enjoy! Grab it here in the Market.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.