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1 .This is Scientific American 60-Second Earth. I'm David Biello. Your minute begins now.
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2 .Humanity inscribes itself into the rock record of Earth's history.
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3 .People now move more sediment than all the world's rivers combined.
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4 .Fossil fuel burning has changed the composition of the atmosphere.
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5 .Everywhere are traces of the sudden appearance of rare radioactive elements like plutonium, a legacy of nuclear weapons.
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6 .And now there's even a new type of rock that people brought into existence.
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7 .Geologists found the novel stone on the beaches of Hawaii.
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8 .Its constituents include solids of volcanic origin, sand, shells and, yes, plastic.
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9 .The discoverers dubbed the material plastiglomerate.
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10 .The finding is in the journal GSA Today, published by the Geological Society of America.
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11 .People's campfires on the beach inadvertently helped create plastiglomerate.
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12 .Some plastic, from a soda bottle, fishing line or a plethora of other possible polymeric sources, found itself near the fire and melted.
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13 .Resultant sticky goo cemented all the disparate bits together.
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14 .The new substance appears to be persistent, destined to stick around for a long, long time.
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15 .And that's the kind of techno-fossil that may prove to be a hallmark of the Anthropocene age, this time of humanity shaping the planet.
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16 .Your minute is up, for Scientific American 60-Second Earth. I'm David Biello,
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