Yes, Earth has a pulse: peaks of geologic activity that occur every 27.5 million years, and herald mass extinctions. Learn more in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/environmental/earth/geophysics/earths-pulse.htm

How Did Napoleon I, the Emperor of the French, Rise and Fall?
15:08

BrainStuff Classics: How Did Alchemy Create Chemistry?
07:11

How Did Sundown Towns Say the Quiet Part Out Loud?
11:35