Where Did the Cannabis Plant Come From?
Season 48
About the Episode
While the origins of the cannabis plant remain unknown, geneticists can trace its evolution and identify its closest living relative.
Aired:
| Expires: | Runtime: 4m 10s
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Extras
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Campi Flegrei: Italy’s Underground Super Volcano
In Italy hundreds of thousands of people are living directly on top of an active volcano.3:43 -
Is the Human Brain Actually Two Minds?
Severing the connection between the two halves of the brain reveals how the hemispheres function.5:17 -
Is Pain Made in the Brain?
This experiment shows how the brain can interpret — and misinterpret— pain.3:40 -
A Hidden Cause of Sinkholes Is Lurking Underground
About 40% of the U.S. is susceptible to sinkholes.2:21 -
The Mysterious Illness That Befell Eiffel Tower Construction Workers
Building the massive Eiffel tower on the bank of the Seine River posed more than one challenge.2:50 -
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The Birth of Artificial Intelligence
The origins of modern AI can be traced back to World War II.3:24 -
How Did Whales Evolve From Land Mammals?
The story of whales’ evolution from land mammals is hidden in their genes.3:08 -
Are Your Online Passwords as Safe as You Think?
Your dog's name, birthday, and zip code do not make secure passwords.2:22 -
The Deepest Underground Lab in the U.S.
A team of researchers hunt for dark matter deep underground in the Black Hills of South Dakota.1:44
