If Puerto Rico becomes a state, we'd have to add a 51st star to the flag. An Emory University mathematician has come up with a method to do it without disrupting Old Glory's symmetry.
The Puerto Rico Democracy Act of 2010, currently making its way through Congress, could make it it a necessity. The bill would grant the territory's residents a vote on their status, and options include statehood or independence.
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.