Geyserite in hot-spring siliceous sinter: Window on Earth's hottest terrestrial (paleo)environment and its extreme life

Cell proliferation at 122°C and isotopically heavy CH ₄ production by a hyperthermophilic methanogen under high-pressure cultivation

Ken Takai, Kentaro Nakamura, Tomohiro Toki et al. · Proceedings of the National Academy of Sciences · 2008 · 810 citations · Full text

Extending the Upper Temperature Limit for Life

Kazem Kashefi, Derek R. Lovley · Science · 2003 · 753 citations

Early Earth, Extraterrestrial Environments, Biosignature +15

Microorganisms from the Gunflint Chert

Elso S. Barghoorn, S. A. Tyler · Science · 1965 · 705 citations

Biology, Unicellular Organism, Microbial Systematics +6

The Proterozoic biosphere: a multidisciplinary study

Choice Reviews Online · 1993 · 615 citations

Protist, Precambrian Geology, Biostratigraphy +2

The Proterozoic biosphere: a multidisciplinary study

J. William Schopf · Lethaia · 1988 · 590 citations

Protist, Precambrian Geology, Biostratigraphy +2