Evan Bush is a science reporter for NBC News.
Climate change is altering the Earth to its literal core, new research suggests. As polar and glacial ice melts because of global warming, water that was once concentrated at the top and the bottom of the globe is getting redistributed toward the equator. The extra mass around Earth’s middle slows its rotation, which in turn has a lengthening effect on our days.
Scientists have long understood that that can accelerate or slow the planet’s rotation — a trend that can shift over 10- to 20-year intervals. Right now, the core is temporarily causing the Earth’s spin to speed up slightly, counteracting the slowing due to climate change. Climate change appears to be affecting Earth’s core, as well, as a result of melting ice and shifts in the planet’s rotational axis.
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