Fossil footprint discoveries and what they tell us

Footprints on a sandy surface don't usually last long: they're washed away by water, wiped out by wind or covered over by new tracks. At certain sites in southern Africa, though, some traces of animals have lasted for many ...

July was the planet's hottest month on record—so far

A sizzling month marked by record heat waves, major wildfires, melting sea ice and a burgeoning El Niño will go down in the books as the hottest July on record—at least until next year, federal officials said Monday.

Morocco breaks heat record

Temperatures in Morocco have for the first time on record topped 50 degrees Celsius (120 Fahrenheit), the North African country's meteorological service said Sunday amid a scorching heat wave.

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