00:00The Earth rotates on an axis, and deep under its crust, so does its core.
00:08However, experts now say their observations have revealed that the inner core is changing
00:12speed and it could actually change the length of our days.
00:15Earth's inner core is located around 3,000 miles underground and is around two-thirds
00:20the size of the moon.
00:21It consists of molten nickel and iron, and by looking at seismic data, which provides
00:25an insight into the reverberations that ripple through the core, geoscientists have been
00:29able to perceive the movement of the inner core, finding it slowing down.
00:33They say the slowing process began in 2010, likely caused by either the outer core's
00:37movement or some gravitational forces, with the researchers telling USA Today,
00:41When I first saw the seismograms that hinted at this change, I was stumped.
00:45But when we found two dozen more observations signaling the same pattern, the result was
00:50inescapable.
00:51So should we be worried?
00:52Probably not.
00:53Here's how the researchers explained it to USC journalists.
00:56It would be very hard to notice, on the order of a thousandth of a second, almost lost in
01:00the noise of the churning oceans and atmosphere.
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