Elämän historia
Kuva: United States Geological Survey – Graham, Joseph, Newman, William, and Stacy, John, 2008, The geologic time spiral—A path to the past (ver. 1.1): U.S.; https://en.wikipedia.org/wiki/Timeline_of_the_evolutionary_history_of_life#/media/File:Geological_time_spiral.png (Public Domain) Uutta ja…