How starfish move their tiny tube feet, and more…

What this episode covers

Starfish don't have brains, and yet they're able to mobilize hundreds of tiny hydraulic tube feet to get around. Now scientists are getting an understanding of just how they do that.PLUS:Atmospheric pollution from an individual rocket re-entry event measured for the first timeHow the Earth’s greenhouse age transitioned into a world with frozen polesWhat is dark matter? The contenders — from WIMPs to dark matter starsQuirks Question: why doesn’t flowing water freeze at the same temperature as still water?(Correction: A previous version of the dark matter story referred to a study published last fall that mapped the distribution of dark matter, but the study was published on Jan. 26, 2026.)

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Frequently Asked Questions

How long is this episode of Quirks and Quarks?

This episode is 54 minutes long.

When was this Quirks and Quarks episode published?

This episode was published on February 27, 2026.

What is this episode about?

Starfish don't have brains, and yet they're able to mobilize hundreds of tiny hydraulic tube feet to get around. Now scientists are getting an understanding of just how they do that.PLUS:Atmospheric pollution from an individual rocket re-entry event...

Can I download this Quirks and Quarks episode?

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