- Organisms basal to previously know O2 producing cyanobacteria, including Melainabacteria and Aurora
- The seasonal dynamics of “O2 oasis” created by photosynthesis in Lake Fryxell microbial mats
- Relationships among microbial mat morphology, microbial communities, and environmental gradients, including nutrient cycling
Exploring Mars with Curiosity (the rover)
- Ancient environmental and diagenetic conditions in Gale Crater, Mars
- Habitability of martian environments
Neoarchean microbial communities
- Pyritic interval associated with a meteorite impact
- Primary productivity in fenestrate microbialites from South Africa
Sumner’s Publications on Google Scholar