Now that recreational marijuana is legal in two states, lawmakers and law enforcement have to grapple with how best to deal with cannabis-impaired drivers.
Sewage is more than just filth. It's evidence of our worst habits, everything from caffeine to cocaine, all ingested and flushed down the toilet. Now scientists are using wastewater to drug-test entire cities, and the results are sobering
Plus adorable echidna puggles
The unfair science behind the M(J) Phelps suspension
In the dark and chatty world of avatars and assumed identities, this cybercop is a virtual Sybil, trolling for creeps and thieves.
What happens when states ease up on penalties for possession
It's arson, bomb and booby trap week at one of the nation's toughest forensics schools.
Synthetic marijuana has been shown to get people good and high. But this is not your parents' weed.
It's not just useless crap.
Drugs have been found in wastewater around the world.
Here's why experts call our desire to drink an 'evolutionary hangover.'
Multiple enzymes delivered in a nanocapsule could work as an alcohol antidote, reducing blood alcohol levels and preventing liver damage.
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.
Flashbacks do occur, but very rarely.
Medical and otherwise
This is the first study to compare smoking marijuana and pills that contain the psychoactive chemical in the plant.
From our archive: a reporter's LSD trip, a guide to getting high during Prohibition, and more
Related: Can cats get high on marijuana?
These down-and-dirty labors are hard, dangerous, and outright gross—and people love them anyway
Researchers find promising antibacterial agents in marijuana
Researchers have discovered the benefits of THC in the brain
While the medical marijuana debate rages on, drug companies race to leverage the power of pot