Strange Sounds
July 4, 2021
A new analysis of geological data from the Marche region suggests that 84 million years ago the Earth’s axis tilted to one side, and then back.
The Earth spin axis slowly shifts over time, taking tens of million years for just one degree of variation. In the process, the geographical location of the North and South magnetic poles changes accordingly. But geophysicists suspect that faster and more traumatic oscillations have occurred during the planet’s history, in particular at the end of the Cretaceous period.