Why Did Houston Flood?
Season 44
About the Episode
Hurricane Harvey broke continental U.S. records. Here's how cities can be better prepared.
Aired:
| Expires: | Runtime: 3m 19s
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Extras
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Can this Cuttlefish Pass an Intelligence Test?
Witness a hungry cuttlefish take part in an oddly adorable, psychological test.9:51 -
Insects Make Protein More Efficiently Than Mammals
Most of the calories insects eat can be converted into nutrients that we can then eat.5:14 -
CBD Helps Anxiety Patients in a Clinical Trial
Unlike THC, CBD is not psychoactive and not known to be intoxicating.3:04 -
NOVA Universe Revealed: Milky Way Preview
Explore the wonders and mysteries of our galaxy—the giant city of stars we call home.0:30 -
NOVA Universe Revealed: Age of Stars Preview
Voyage to discover the sun’s place in a grand cycle of birth, death and renewal.0:30 -
Incarcerated for Cannabis: Who's Still in Prison and Why?
Many states have legalized cannabis for medical use, but thousands are still in prison.3:54 -
Cannabis Reverses Brain Aging in Mice
Low doses of THC from cannabis can help older mice learn faster, researchers found.3:51 -
The Arctic Jet Stream Affects Global Climate. Here's Why.
The jet stream is a band of wind that influences weather in the northern hemisphere.3:03 -
This Detector Can Catch Cosmic Neutrinos
Neutrinos could help unlock one of the biggest mysteries in physics today.3:20 -
How Cannabis Affects Teens' Brains
Our natural endocannabinoids reach their highest levels as the brain develops.3:28
