Most craters from the early Earth have vanished. At North Pole Dome, one survived. Its rocks preserve the trace of a space impact from 3.024 billion years ago – a rare page from the violent youth of our planet, with the date still written in the stone. In the Pilbara of Western Australia, some of Earth’s oldest rocks lie beneath the sky, as they have for billions of years. They are dark, weathered volcanic rocks, close to 3.5 billion years old, cut by veins and stewed by deep time. Their survival i... [5680 chars]
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