Earth’s solid metal core may no longer be spinning relative to the vast mass of the surrounding planet thanks to what appears to be a recent slowdown, according to the results of a new study.

Many spline-connected brakes include a flat root-side fit, which minimizes the clearance at the teeth sides; the inner and outer diameters have significant clearance, and backlash is reduced.

The spinning, solid inner core of the Earth may be slowing down by a minuscule amount, according to evidence from earthquakes. Skip to main content Open menu Close menu ...