On Today's Podcast

The Science Of Replacing Body Parts, From Hair To Hearts

In “Replaceable You,” Mary Roach describes mind-boggling efforts to replace human body parts—and why it’s proven to be so difficult.

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October 10, 2025

We check in on some exciting space missions and projects from IMAP to LIGO. Plus, in “Dinner With King Tut,” Sam Kean shows how experimental archaeology can recreate the stinky, slimy, and tasty parts of ancient history. And, behind the scenes of the removal of four dams along the Klamath River, and the massive restoration effort that’s followed.

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Video

Shooting Stars

Photographer Colin Legg makes time-lapse movies of celestial scenes. Legg shares tips, and describes some of the challenges of landscape astrophotography—from babysitting cameras for days and nights on end to running electronics off the grid.

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