This week, Hurricane Harvey has seemingly exhausted every superlative that can be associated with a storm. Words like “catastrophic” and “historic” and “disastrous” are just some of those being used ...

CAMBRIDGE, Mass.–Astronomers led by an MIT professor have revised the scale used to assess the threat of asteroids and comets colliding with Earth to better communicate those risks with the public.

NPR's Michel Martin speaks with Mark Bryant of the Gun Violence Archive, which has been keeping track of all known instances of gun violence in America since 2013. Now we want to get a better ...