Thursday, May 14, 2020

A peripatetic cosmic calendar

32075449. sy475 A footstep analogy: imagine each step represents a century... (The Ends of the World: Supervolcanoes, Lethal Oceans, and the Search for Past Apocalypses by Peter Brannen g'r)
Luckily, geologists have come up with some mental tricks to help us grok our place among the eons. One of them involves a footstep analogy* that goes something like the following: imagine each step you take represents 100 years of history... After only a few dozen steps—before you can even reach the end of the block—all of recorded history peters out... You would  have to keep walking for 20 miles a day, every day, for four years to cover the rest of the planet's history...

No comments:

Post a Comment