Dinosaurs might have known a surprising amount about what we think of as a quintessentially modern problem: global warming.

The nation of Ethiopia is seeking to leverage its past-including its most famous daughter, the hominid called Lucy-to help secure its future.

A frog the size of a bowling ball, with heavy armour and teeth, lived among dinosaurs millions of years ago. It was intimidating enough for the scientists who unearthed its fossils, to name the beast Beelzebufo, or Devil Toad. But its size, 4.54 kilograms and 40.64 centimetres long, is not the only curiosity. Researchers discovered the creature's bones in Madagascar. Yet it seems to be a close relative of normal-sized frogs who today live half a world away in South America, challenging assumptions about ancient geography. The discovery, led by paleontologist David Krause at New York's Stony Brook University, was published on Monday by the journal Proceedings of the National Academy of Sciences. "This frog, if it has the same habits as its living relatives in South America, was quite voracious,' Krause said. "It's even conceivable that it could have taken down some hatchling dinosaurs.' Krause began finding fragments of abnormally large frog bones in Madagascar, off the coast of Africa, in 1993. They dated back to the late Cretaceous period, roughly 70 million years ago, in an area where Krause also was finding dinosaur and crocodile fossils. But only recently did Krause's team assemble enough frog bones to piece together what the creature would have looked like, and weighed. The largest living frog, the Goliath frog of West Africa, can reach 3.18 kilograms. But Krause teamed with fossil frog experts from University College London to determine that Beelzebufo is not related to other African frogs.

In a research by paleoceanographer Andre Bornemann of Leipzig University in Germany and his colleagues analyzed apparently unaltered Foraminifera picked from sediment core drilled from Demerara Rise beneath the western equatorial Atlantic. Following a classic technique, the researchers measured oxygen isotopes in the forams' shells. They found a sharp shift toward the heavier oxygen-18 isotope in both surface and bottom dwelling forams from 91.2 million years ago.

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