Researchers analyze THC in breath of cannabis smokers

Most states in the U.S. allow people to use cannabis for medical or recreational purposes. Yet all states want their roadways to be safe. A breathalyzer that can accurately identify people who recently smoked cannabis might ...

WhatsApp patches flaw after spyware revelation

WhatsApp on Tuesday warned users to upgrade the application to plug a security hole that allowed for the injection of sophisticated malware that could be used to spy on journalists, activists and others.

Predicting urban and coastal microclimates

Today, most of the world's population lives in cities, and a significant fraction (nearly 40 percent) lives within about 30 miles of a coastline. Predicting local weather patterns and microclimates in these highly populated ...

Landing is key puzzle in Mars trip, experts say

Landing astronauts safely on Mars is one of the biggest technological hurdles for any future manned mission to the Red Planet, even more complicated than last year's daring rover touchdown.

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