NOVA | How Does a Brain on THC Compare to a Brain on CBD? | Season 48

Use one of the services below to sign in to PBS:

You've just tried to add this video to My List. But first, we need you to sign in to PBS using one of the services below.

You've just tried to add this show to My List. But first, we need you to sign in to PBS using one of the services below.

By creating an account, you acknowledge that PBS may share your information with our member stations and our respective service providers, and that you have read and understand the Privacy Policy and Terms of Use.

ncG1vNJzZmivp6x7sa7SZ6arn1%2BrtqWxzmifqK9dmbymv4ybqZqhnmLBqa%2BMnKamqJGnsm6u0Zqgp2WTl7FuxMuymLOrXw%3D%3D