A fireball lit up the skies over the Great Lakes in the early hours of Sunday and was visible for hundreds of miles.

Astronomer Jocelyn Bell Burnell detected a strange signal from outer space that would lead to the discovery of the radio ...

A new study says observations from the NASA Fermi space telescope suggest a halo of dark matter around the center of our ...

A series of severe, decades-long droughts ushered the end of the Indus Valley Civilization, one of the world's oldest ...

A recent study examined changes in tree canopy cover around California schools. The observed declines could put kids at ...