The History of Life on Earth - Crash Course Ecology #1
Why the open web links it
Provides an overview of the history of life on Earth, setting the stage for an ecology course.
Linked by 11 independent sites, 2 of them widely read in the 2026-10 crawl of the open web, including pbworks.com, gifu-u.ac.jp, atlanticoer-relatlantique.ca, borgerlyst.dk, circularclassroom.com.