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This week in science: A new black hole star, exercises for dementia, and winter shrews

NPR | By Nathan Rott,

Regina G. Barber

Published August 21, 2026 at 6:19 PM EDT

NPR's science podcast Short Wave talks about a new type of black hole star, the types of exercise linked to lowered dementia risk, and the wintry adaptations of the long-clawed shrew.

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science

Nathan Rott

Nathan (Nate) Rott is a correspondent on NPR’s Science Desk, where he reports on the natural world and humanity’s relationship to it.

See stories by Nathan Rott

Regina G. Barber

Regina G. Barber is a co-host of Short Wave.