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Unexplainable is a science show about everything we don’t know. Host Noam Hassenfeld is joined by an array of experts and Vox... more

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Skeleton Lake

When scientists examined the DNA of ancient bones found near a Himalayan lake, they were forced to confront a seemingly... more

19 Jan 2022 · 29 minutes
Are humans running out of sperm?

In 2017, researchers published an explosive finding: Sperm counts may be declining in some countries around the world. Media outlets... more

12 Jan 2022 · 28 minutes
The quest to build a star

Scientists are closer than ever to harnessing fusion power — the same process that powers the sun — by essentially... more

05 Jan 2022 · 29 minutes
BONUS: The 2021 song

Noam wrote an end-of-year song with Today, Explained host Sean Rameswaram, so we thought to drop it here as a... more

31 Dec 2021 · 5 minutes
The building blocks of the universe

Most of the matter in the universe is dark matter, an invisible, untouchable, mysterious substance. Scientists don’t know what exactly... more

22 Dec 2021 · 54 minutes
99% of ocean plastic is missing

How can we solve the problem of ocean plastic if we don’t know where most of the plastic is? For more,... more

15 Dec 2021 · 30 minutes
How medicine mansplained women’s health

Until 1993, many researchers excluded women from clinical drug trials, leaving doctors in the dark about how new treatments work... more

08 Dec 2021 · 26 minutes
How Venus went to hell

Venus is the hottest, scariest place in the solar system, but billions of years ago it may have been a... more

01 Dec 2021 · 28 minutes
Mind readers

Will scientists ever fully understand the human brain? In their quest for knowledge, they’ve tried knives, magnets, computers, blood, and... more

17 Nov 2021 · 33 minutes
A brainless yellow goo that does math

Slime molds can navigate mazes, control robots, and make complicated decisions, all without a central nervous system. If this weird... more

10 Nov 2021 · 26 minutes
Skeleton Lake