A novel manufacturing method could make it practical to stack solar cells and convert more of the energy in sunlight into electricity.
If the cosmos is a numerical simulation, there ought to be clues in the spectrum of high energy cosmic rays, say theorists
Japanese researchers build a gun capable of stopping speakers in mid-sentence.
A 19th-century idea might lead to cleaner cars, larger-scale renewable energy.
Saying that half of all the 2009 stimulus-supported clean energy companies went out of business is plain wrong.
Even with a terrible recession and a natural-gas bonanza, the U.S. isn’t cutting emissions fast enough.
Getting people to eat well and exercise is the biggest unsolved problem in health care.
Better technology and high battery costs have revived interest in hydrogen-guzzling vehicles.