Image: “A phylogenetic tree of life, showing the relationship between species whose genomes had been sequenced as of 2006. The very center represents the last universal ancestor of all life on earth. The different colors represent the three domains of life: pink represents eukaryota (animals, plants and fungi); blue represents bacteria; and green represents archaea. Note the presence of Homo sapiens (humans) second from the rightmost edge of the pink segment.” (Source: Wikimedia Commons)

This week’s episode is available on our Podcast host here: Episode 2