Title:
Earth tipped on its side (and back again) in 'cosmic yo-yo' 84 million years ago
Author:
Harry Baker
Published:
Live Science, October 2021]
From the article:
Earth has not always been upright. Turns out, the planet's crust tipped on its side and back again around 84 million years ago, in a phenomenon that researchers have dubbed a "cosmic yo-yo."