Top news for December 21, 2008

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Rocket launch today: SpaceX launching US spy satellite in morning liftoff

On this day in space! Oct. 14, 1947: Chuck Yeager smashes the sound barrier.

What Does a More Contagious Virus Mean for Schools?

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

How to (Literally) Drive the Coronavirus Away

How Safe Are Covid-19 Coronavirus Vaccines? Here’s The Allergic Reaction Risk

How many French revolutions were there?

NASA Conducts Hot Fire Test of Massive SLS Rocket Core Stage for Artemis I Moon Mission

'Old Faithful' galaxy has brilliant outbursts every 114 days

Science Made Simple: What Is Radioactivity?