Quote by Carl Woese
"The tree of life has no roots; it begins with the emergence of self-replicating molecules."
More from Carl Woese
"The RNA world is a hypothesis that suggests an early stage of life on Earth where RNA molecules performed the dual functions of storing genetic information and catalyzing chemical reactions."
"Life did not take over the globe by combat, but by networking."
"Microorganisms are the most successful form of life on Earth, having been here the longest and in the greatest numbers."
"The universal ancestor is the root of the tree of life, connecting all living organisms through common descent."