The definition of a “superpower” is rather subjective. In the Cold War it was applied only to the United States and the ...

The iridescent cloud reveals new clues about ice formation in the Martian atmosphere (no little green men, sorry).

Meteorologists warn that the coldest burst of Arctic air this season is coming to put an icy and prolonged exclamation point ...

One of the most vast glaciers in Antarctica, the Doomsday Glacier, has got an international team of scientists concerned ...