The P3 conforms to the listener’s ears better than other headphones. Designers cushioned the earcups with memory foam, which molds to the ears and creates a seal that helps keep out ambient noise. Bowers & Wilkins P3 Mobile Hi-Fi Headphones$200
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.