Watch the 2021 Doomsday Clock announcement LIVE on January 27 at 10am EST

asteroids

radio telescope, Arecibo Observatory

Hurricanes, earthquakes, and now this. A Puerto Rican scientist’s lament for the loss of a legendary telescope

By John Morales | Climate Change, Columnists

The dilemma of nuclear energy in space

By John L. Remo | Nuclear Weapons, Special Topics, Technology and Security