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Researchers are plugging in smokers, alcoholics, and even crack addicts to expose them to a relapse environment--and teach them how to deal with it. Will it work?

Plus glitches as art, a pristine frozen lake, and more

A former military fort controlled by the Triads, Kowloon Walled City was demolished 20 years ago. Here's what life was like there.

Twitter's new music app creates a playlist of the music that's blowing up on your Twitter feed. But is that the kind of music you want to listen to?

In a small country, you've got to be careful about keeping it in the family.

ALMA is the best way to see these births in super-fertile galaxies, which helps scientists understand how galaxies form.

The nation's research-grade cannabis is controlled by the National Institute on Drug Abuse, whose mission to curb use is at odds with that of researchers looking to study pot's therapeutic properties.

One of agriculture's most dangerous substances, anhydrous ammonia requires several precautions to handle.

From our archive, a dramatic first-hand account of marijuana overdose.

Why health care reform must include changes to how people pay for hospital care

You have a lot more in common with Fido than you think.

Plus three robots that are already saving lives.

Related: Can cats get high on marijuana?

Side-stepping traffic by mining data

Guess the species (either common or Linnaean) by tweeting at us--we're @PopSci--and get your name listed right here! Plus eternal glory, obviously. Update: We have a winner!

Mice who got nanosponge injections survived lethal doses of toxins.

Turning plant byproducts into digestible carbs could feed more people.

How one New York bartender fused alcohol and marijuana forever

Elevator riders tend to arrange themselves into mini social hierarchies.