Wednesday, December 23, 2020

One Million Americans Vaccinated Against COVID-19: Official

More than a million people have received their first dose of a Covid-19 vaccine in the United States, Centers for Disease Control and Prevention (CDC) director Robert Redfield said Wednesday.

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NASA Solves Black Hole Jet X-ray Mystery with IXPE’s Polarization Powers

NASA’s IXPE satellite may have solved a longstanding astrophysical mystery: how are X-rays produced in the extreme jets of supermassive blac...