For a baseline, let’s calculate the tidal acceleration that an approximately 6-foot-tall (1.8 meters) person feels between their head and their feet while on the surface of Earth. Plugging in ...

Here's why: The Earth's rotation has been slowing a little bit every year since the planet formed some 4.5 billion years ago, and we have a phenomenon known as tidal acceleration to thank.

Boon says his examination of tidal stations with shorter records—using a 43-year base period from 1969 to 2011—“confirms that addition of a quadratic term representing acceleration is statistically ...