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About a third of epilepsy patients don't respond to medication.
3:28
Our natural endocannabinoids reach their highest levels as the brain develops.
6:50
Lions and African wild dogs hunt their prey very differently.
4:05
This researcher shoots lasers at trees in order to measure how much carbon forests store.
4:19
In 2018, June Smith takes a consumer DNA test, hoping to solve a longstanding mystery.
2:51
Hidden under Paris is a rich source of limestone, a vast labyrinth of quarry tunnels.
5:20
Are DNA ancestry tests equally accurate for all test takers?
5:29
It took Black chemist Percy Julian more than 10 years to earn his Ph.D.
3:20
Neutrinos could help unlock one of the biggest mysteries in physics today.
3:54
Many states have legalized cannabis for medical use, but thousands are still in prison.
8:22
"Beyond the Elements" host David Pogue explores the science of hot peppers—viscerally.
5:05
Could an out-of-order immune system be to blame?
