For Sale: Renovated Luxury Condo; Can Survive Nuclear Attack
Affluent buyers worried about doomsday are snapping up well-appointed bunkers built in a former missile silo.
Technology
Paper-Thin Printed Solar Cells Could Provide Power for 1.3 Billion People
Thanks to inexpensive printed solar cells, 1.3 billion people currently without electricity may be able to plug in for the first time.