Take the Earth’s rotation, for example. Related Story Earth’s Rotation May Be an Untapped Energy SourceWhile the Earth’s rotation changes over cosmic timescales, it also fluctuates on daily ones. Naval Observatory in Washington D.C.—that Earth’s rotation is speeding up. These are the dates when the Moon will be furthest from the equator, which will impact the speed of Earth’s rotation. Related Story Global Warming Is Slowing Earth’s Rotation“Nobody expected this,” Leonid Zotov, an Earth rotation expert from Moscow State University, told timeanddate.com .