Top news for December 21, 2008

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Singularities Can Exist Outside Black Holes--in Other Universes

Synthetic tissue model with blood vessels

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

Jeff Bezos' Blue Origin targeting Aug. 26 for next spaceflight

‘Nursing Is in Crisis’: Staff Shortages Put Patients at Risk

Good, but Not Great: Taking Stock of a Big Ten University’s Covid Plan

In Photos: A Breathtaking ‘Blue Moon’ And Jupiter Soar Into Twilight Skies Around The World

Rev. Jesse Jackson Hospitalized With Covid-19, Was Vaccinated In January

Sweden's Highest Mountain Is Shrinking, And The Reason Is All Too Predictable

Hubble Spots a Dazzling Cluster in the Cloud