Medical-marijuana legalization doesn't seem to lead to an increase in pot usage for teenagers.
For both teens and adults, alcohol appears more dangerous for the brain than marijuana is.
Thousands of pot supporters mark the "high" holiday by lighting up at 4:20 p.m. But the celebration may increase the risk of fatal car crashes.
It's really tricky to measure how much marijuana a person has used on a given day — and how impaired their driving may be as the result of that use — a new review says.
Marijuana is the most commonly used illicit drug in pregnant woman, and now its use is increasing, a new study finds.
A compound in marijuana appears to be relatively safe and nonaddictive, according to a new report from the World Health Organization (WHO).
Stay up to date on the latest science news by signing up for our Essentials newsletter.
Thank you for signing up to Live Science. You will receive a verification email shortly.
There was a problem. Please refresh the page and try again.