Top news for December 21, 2008

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Where COVID-19 hit hardest, sudden deaths outside the hospital increased

RNA ties itself in knots, then unties itself in mesmerizing video

This is What the Sun Looked Like for Every Day in 2020

Climate change will alter the position of the Earth's tropical rain belt

A new archaeology for the Anthropocene era

Stretching Can Be Better Than Walking to Lower High Blood Pressure, Study Finds

On This Day In Space: May 25, 2008: NASA's Phoenix spacecraft lands on Mars

Mary Catherine Bateson Dies at 81; Anthropologist on Lives of Women

C.D.C. Warns the New Virus Variant Could Fuel Huge Spikes in Covid-19 Cases

SpaceX will launch its 1st Starlink satellites of 2021 on Wednesday. Here's how to watch.