19/09/2025

Why lightning is so terrifying on California's highest peaks

As a late-summer monsoon spread across California in recent weeks, it delivered hundreds of thousands of lightning strikes—record numbers in August and the first week of September. Those sparked hundreds of wildfires and, ...

Tracing the 'Green Sahara' in Chad's northern desert

A cloud of dust escapes from an excavation site in the sand of Chad's arid north, where scientists are looking for signs of human habitation in an area once humid and called the "Green Sahara."

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