All Life on Earth Comes From One Single Ancestor. And It's So Much Older Than We Thought.
While the Cambrian Explosion kickstarted complex life in a major way some 530 million years, the true timeline of life on ...
Nature3y
Major events in the evolution of amino acid synthesis
The way amino acids are synthesized has changed during the history of Earth. The Hadean eon represents the time from which Earth first formed. The subsequent Archean eon (approximately 3,500 ...
PBS8y
Deep Time
The Precambrian eon is vast, almost unimaginably so ... this includes all of geological time prior to the Cambrian period. Hadean Era (4,550-3,850 mya) The Precambrian's oldest era, the Hadean ...