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‘A climate of unparalleled malevolence’: are we on our way to the sixth major mass extinction?

Churning quantities of carbon dioxide into the atmosphere at the rate we are going could lead the planet to another Great DyingDaniel Rothman works on the top floor of the building that houses the Massachusetts Institute of Technology (MIT) Department of Earth, Atmospheric and Planetary Sciences, a big concrete domino that overlooks the Charles River in Cambridge, Massachusetts. Rothman is a mathematician interested in the behaviour of complex systems, and in the Earth he has found a worthy subject. Specifically, Rothman studies the behaviour of the planet’s carbon cycle deep in the Earth’s past, especially in those rare times it was pushed over a threshold and spun out of control, regaining its equilibrium only after hundreds of thousands of years. Seeing as it’s all carbon-based life here on Earth, these extreme disruptions to the carbon cycle express themselves as, and are better known as, “mass extinctions”.Worryingly, in the past few decades geologists have discovered that many...


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