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Stalagmites in Mexican caves reveal duration and severity of drought during the Maya collapse

A drought lasting 13 years and several others that each lasted over three years may have contributed to the collapse of the ...
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'Such caves weren't used for ordinary living': Rare finger grooves from ancient peoples found in glittering Australian cave

Thousands of years ago, adults and children left their marks on soft rock surfaces deep in this cave in GunaiKurnai Country.