Pathogenesis: A History of the World in Eight Plagues

by Jonathan Kennedy

If we trace the Tree of Life to the base of its trunk, we find the Last Universal Common Ancestor (LUCA): a single-celled, bacterium-like organism that is the distant progenitor of all living things, humans included.

Less than 0.001 percent of all species on the planet are eukaryotes.

A retrovirus is a specific type of virus that reproduces by inserting a copy of its DNA into the genome of the host cell.