Humans have changed the Earth in such profound ways that scientists say we have entered a new geological period: the Anthropocene Epoch. But when did the new epoch officially begin? And how, exactly, ...

Dinosaur or mud stain? An ancient cave drawing high on a rock formation in southeastern Utah has stirred a skirmish of sorts between creationists who believe it's proof that humans and dinosaurs lived ...

Scientists on five continents are hunting for geological evidence to pinpoint exactly when humans became a major force shaping life on Earth. But... Drawing A Line In The Mud: Scientists Debate When ...

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