What geological time are we in now anyway? Kritsada Seekham / Alamy Stock Photo
One big debate in science is whether the impacts of human actions on earth are now so large that we have entered a new geological time. Called the Anthropocene, its formal designation would mean the old forces of nature that transformed our planet many millions of years ago, including meteorites and mega-volcanoes, are joined by another: us. What geologists call the Holocene Epoch would be over. The exact date would be up for debate, but it would probably be within the past few hundred years.
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