Biologist Lynn Margulis is a professor at the University of Massachusetts Amherst. Probably her most important scientific contribution is the endosymbiotic hypothesis of the origin of mitochondria as separate organisms that long ago entered a symbiotic relationship with eukaryotic cells through endosymbiosis (see also symbiogenesis).

She is a proponent of the Gaia theory, based on an idea developed by the English atmospheric scientist James Lovelock. She was the first wife of Carl Sagan, and mother of Dorion Sagan.

External links