A clever way to estimate enormous numbers - Michael Mitchell
Why the open web links it
Explains Fermi estimation, a method for making educated guesses about large, complex quantities.
Linked by 7 independent sites, 3 of them widely read in the 2026-10 crawl of the open web, including libretexts.org, wlu.ca, transum.org, lanostra-matematica.org, mathisintheair.org.