Using tiny sensors to monitor migrating monarchs

Millions of monarch butterflies migrate each fall to a specific cluster of mountain peaks in central Mexico. How exactly they navigate to their winter home, and the way they choose their path, is a topic of great interest ...

Ancient human tracks on South Africa's west coast

It's been 27 years since geologist David Roberts identified some of the oldest footprints of our species ever discovered. The trackway of three footprints was found on the surface of a cemented sand dune (called an aeolianite) ...

What is a bomb cyclone? An atmospheric scientist explains

A bomb cyclone is a large, intense midlatitude storm that has low pressure at its center, weather fronts and an array of associated weather, from blizzards to severe thunderstorms to heavy precipitation. It becomes a bomb ...

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