PNAS Science Sessions

PNAS
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Dec 14, 2020 • 18min

Preserving muscle and bone mass in space

Se-Jin Lee and Emily Germain-Lee explain a way to preserve bone and muscle mass during spaceflight.
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Nov 23, 2020 • 12min

Predicting the Asian giant hornet's spread

David Crowder and Gengping Zhu explain how to predict the spread of the Asian giant hornet.
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Nov 9, 2020 • 22min

Supernova and mass extinction

Brian Fields explores a hypothesis that a supernova may be responsible for a mass extinction.
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Oct 26, 2020 • 24min

Future of artificial intelligence

Eric Horvitz discusses AI's promises and perils.
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Oct 12, 2020 • 17min

Origin and diversification of penguins

Juliana Vianna and Rauri Bowie explain the origin and diversification of penguins.
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Sep 28, 2020 • 17min

Economics of Greenland ice sheet melting

William Nordhaus explains the economic consequences of Greenland ice sheet melt.
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Sep 14, 2020 • 17min

Military conscription and public sector employment

NAS member Dalton Conley explains how the Vietnam War draft lotteries are a natural experiment for studying how military service affects life outcomes.
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Aug 31, 2020 • 17min

Transitions tied to early farming

Clark Larsen describes the costs of urban life a Neolithic city.
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Aug 17, 2020 • 15min

Soil bacterium that lives on air

Mette Svenning and Alexander Tveit describe a bacterium that can live on gases in the air.
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Aug 3, 2020 • 15min

Exploring bivalve shell design

Derek Moulton explains the mathematics behind bivalve shell design.

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