Amazon basin tree rings hold a record of the region's rainfall

The Amazon basin contains the world's largest rain forest, famous for its rich biodiversity and importance in the world's oxygen and carbon cycles. It also has an outsized influence on water cycles in South America and beyond. ...

When hippos roamed, past temperatures were much higher

Although Oxford's meteorological records go back 250 years, to before the French Revolution and even the American war of independence, scientists have gone back thousands of years to discover that our world has been much ...

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