NASA researchers have identified geological structures on Mars that are unlike anything found on Earth. From spider-like ...

A new book explores how one biologist’s work at the North and South Poles changed the way he sees the world and our place in ...

Throughout Earth's history, ice caps have been very rare, but a model of the past 420 million years suggests an explanation ...

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