Nature

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Cretaceous amber has ponied up another spectacular find, and something rarely seen before: tiny arachnids, with mobile tails longer than their bodies. The creatures were encased in tree resin roughly 100 million years ago, during the mid-Cretaceous, and the discovery shows that the extraordinary family of arachnids could have roamed our planet for at least 280
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Some 110 million years ago, in the swamp that would become the Washington suburbs, a hulking, armored nodosaur trudged along a riverbank, leaving a telltale print in the mud. Its offspring scrambled after it, slipping in the parent’s print. Other dinosaurs crowded the setting: A long-necked sauropod squelched through the muck, while several theropods –