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.
The website for the Affordable Care Act was doomed by an inordinately complex setup that tried to link disparate databases in real time.
The U.S. will still need more big breakthroughs to eliminate the need for imported oil.