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Cool Science Radio

Cool Science Radio | October 31, 2024

By Lynn Ware Peek,

Katie Mullaly

Published October 31, 2024 at 2:50 PM MDT

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Cool Science Radio graphic

Paleoanthropologist Donald Johanson, who found the 3.2 million-year-old iconic fossil "Lucy," discusses finding the fossil 50 years ago in the Ethiopian desert. (1:05)

Scientific American journalist Mark Fischetti explains why the earth’s rotation is changing and how that relates to how global timekeepers accurately keep time. (34:06)

Cool Science Radio

Lynn Ware Peek

KPCW Co-Host / Producer

See stories by Lynn Ware Peek

Katie Mullaly

Cool Science Radio Co-Host

See stories by Katie Mullaly