What's Dark Matter?

What is dark matter? Why do scientists think it exists? How are they searching for it, and why are they doing it in an underground lab?! Join us on the search for dark matter with Alvaro Chavarria, a physicist running a dark matter detector underneath a mountain in the French Alps. We’ll take you inside the lab to visit the detector, and find out why everything we think we know about dark matter… could be wrong. For more, visit our website! Our question comes from Jeronimo, a Tumble en Español listener! To listen to Tumble en Español, use this link to

You can listen to What's Dark Matter? online on Radio and Podcast. Open the player on this page to stream the available audio.

What's Dark Matter? is an episode from Tumble Science Podcast for Kids by Tumble Media.

This episode is 25:14 long.

This episode was published on Mar 20, 2026.

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