From stars to needles to amorphous globs, scientists are demystifying a snowflake’s complex construction, showing how factors ...

Air bubbles within a deep ice core drilled in Antarctica could reveal why Earth suddenly began to experience longer ice ages ...

A comparison of polar sea ice extents on two random days does not provide enough information to determine whether or not Earth's climate is changing.

For decades, astronomers have tried to determine how Pluto acquired its unusually large moon Charon, which is about half the ...