Space Tourism’s Black Carbon Problem
The industry and the F.A.A. say the climate effects of flying civilians into space will be negligible, but some scientists fret about the accumulation of black carbon in the stratosphere.
The industry and the F.A.A. say the climate effects of flying civilians into space will be negligible, but some scientists fret about the accumulation of black carbon in the stratosphere.
It's a fact of the archaeological record: Modern humans survived and Neanderthals did not. Why? And what does it teach us about our own survival?
A new device protects soldiers by detecting and locating optical glass.
The process that created Dolly the sheep in 1996 has now been proven successful in humans.
And without it, could I do everything a five-toed human does?
All states now have a 0.08 percent legal limit, but the U.S. National Transportation Safety Board says you're drunk at 0.05 percent blood-alcohol content.
From New York, around Florida and up the Mississippi, all to study a subatomic particle that only lives two millionths of a second.
As PopSci cheers from the carrier deck
Forensic image analysis relaunches the controversy.
Hackers have attacked major U.S. banks over most of the past year, according to a new report.
Researchers have pinpointed a set of biological markers that could help diagnose PTSD--and, eventually, treat it.
Scientists accidentally discover a new way to isolate gold that is much safer than existing processes, which use toxic cyanide.
In 2010, OxyContin introduced a new formula that drug abusers can't crush to a powder to snort or inject. This is how it works, chemically, and whether it actually deters abuse.