http://www.sciencemag.org/news/2020/06/pools-mexican-desert-are-window-earth-s-early-life

Azure pools rich in magnesium and calcium carbonate but low in phosphorus provide an ideal habitat for ancient bacterial reefs at Cuatro Ciénegas, in the Chihuahuan Desert of Mexico.

Valeria Souza Saldívar never planned to devote her life to a remote and ancient oasis more than 1000 kilometers north of her laboratory in Mexico City. But a call in early 1999 changed that.