Evidence suggests more mega-droughts are coming

Mega-droughts—droughts that last two decades or longer—are tipped to increase thanks to climate change, according to University of Queensland-led research.

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 ...

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