How did such a strange plant like cannabis come to be in the first place? When and where did we first domesticate it? And why oh why does it get us high?

Hank explains the science behind the effects of that wackiest of weeds, cannabis sativa - aka marijuana.

Lenny and Amy’s 5-year-old son has epilepsy. When conventional medications caused terrible side effects, they started giving him a daily drop of cannabis oil, with dramatic results. But it’s a calculated risk: While there is anecdotal...

Lenny and Amy's 5-year-old son has epilepsy. When conventional medications caused terrible side effects, they started giving him a daily drop of cannabis oil, with dramatic results. But it's a calculated risk: While there is anecdotal...

35,000 walruses all hanging out at the same beach in Alaska? Why? Does global warming have anything to do with it? And what have we learned after 20 years of studying the effects of marijuana? SciShow News explains.

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. In 2012, Colorado legalized cannabis and added to what has fast become a multibillion-dollar global industry for...

Warning: Contains talk of cannabis.<br/>
CBD: Marijuana Without the High

Hank explains the science behind the effects of that wackiest of weeds, cannabis sativa - aka marijuana.

SciShow News delves into the history of marine animals and finds that they’re getting bigger, and unlocks the secret of how cannabis creates one of its most medically useful effects.

A look at marijuana laws across the United States.

Howcast - Learn how to talk to your friends and family about medical marijuana use in this Howcast video.

Howcast - Learn how caregivers can help medical marijuana patients in this Howcast video.

Howcast - Learn about marijuana use and chronic pain in this Howcast video.

Howcast - Learn about marijuana use and gastrointestinal (GI) disorders in this Howcast video.

Howcast - Learn about marijuana use and cancer in this Howcast video.

Howcast - Learn how marijuana use affects thought processes and memory in this Howcast video.

Howcast - Learn the effects caused by smoking pot versus eating it, like in pot brownies, in this Howcast video.

Howcast - Learn about marijuana compounds THC and CBD in this Howcast video.

Howcast - Learn about the different ways to ingest marijuana in this Howcast video.

Howcast - Learn about spice, also known as synthetic marijuana, in this Howcast video.

Howcast - Learn how to keep medical marijuana out of the hands of children in this Howcast video.

Howcast - Learn why marijuana is demonized by some people in this Howcast video.

Howcast - Learn about Sunil Aggarwal, one of Howcast's marijuana experts, in this video.

Howcast - Learn about the spiritual and religious use of marijuana by various cultures in this Howcast video.