On Today's Podcast

Bearded Vulture Nests Hold Trove Of Centuries-Old Artifacts

Picking through a dozen vulture nests, scientists discovered hundreds of artifacts, including a sandal that could be more than 700 years old.

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November 7, 2025

Two new studies suggest that, contrary to longstanding belief, dinosaurs were not on the decline before the Chicxulub asteroid impact. Plus, a giant infrastructure project aims to block invasive carp from entering Lake Michigan, but Chicago’s polluted water already keeps them out. And, Lake Xochimilco in Mexico City is the only place where axolotls live in the wild, and they face growing threats.

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Segment

16:37

Redefining the Kilogram

All the scales in the world are calibrated against a 125-year-old chunk of metal in a vault on the outskirts of Paris. Now scientists are looking to redefine the standard of what “kilogram” really means.

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