It’s 4/20 - the unofficial "high holiday." The pleasant euphoria people feel when they smoke marijuana is all because of the main chemical produced in the cannabis plant: delta-9-tetrahydrocannabinol...or THC.May 6, 2018
UP NEXT
U.K. Airbus plant converted into coronavirus ventilator factory
01:34
Buying renewable energy from your neighbor: One startup’s mission to reshape the marketplace
07:03
Big food is betting big on regenerative agriculture in climate change fight
02:36
Scientists trained rats to drive tiny cars. It could have huge implications for our mental health.
01:48
First commercial drone home delivery service in U.S. takes flight
01:53
Why leaves change color: the science of fall foliage