ancient

Modern-day sloths are tree dwellers, only occasionally venturing down to the ground. But about five to eight million years ago, five sloth species ventured into the sea. Now, new research suggests that these ancient animals went much further into the water than we ever knew. Instead of just living near the ocean and making brief...

The giant “devil frog” was even more terrifying than previously thought, a new study says. Recent fossil analysis shows that the predatory amphibian, Beelzebufo ampinga, was smaller than first described, but had spiky flanges protruding from its skull and plate-like armor down its back. (Also see “7 Demonic Creatures: Thorny Devil, Satanic Gecko, More.”) Initially estimated...

We officially have fossil evidence that the whining bane of many a summer night was busy sucking blood as far back as 46 million years ago, a new study says. Scientists have discovered blood in a mosquito fossil in the oil shale of northwestern Montana. Researchers found the insect’s last blood meal by detecting heme—a pigment in...

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