Study challenges existence of arsenic-based life, Nature “A group of scientists, led by microbiologist Rosie Redfield at the University of British Columbia in Vancouver, Canada, have posted data on Redfield’s […]
extremophile
Posted inExtremeophiles and Extreme Environments
Response to Comments on "A Bacterium That Can Grow Using Arsenic Instead of Phosphorus"
“Concerns have been raised about our recent study suggesting that arsenic (As) substitutes for phosphorus (P) in major biomolecules of a bacterium that tolerates extreme As concentrations. We welcome the […]
Posted inAstrogeology, Conferences and Meetings, Extremeophiles and Extreme Environments
Arsenic, Astrobiology, NASA, and the Media
Exclusive Interview: Discoverer of Arsenic Bacteria, in the Eye of the Storm, Science Now “Q: So, NASA approached you about doing a press conference, and you thought that was a […]
Posted inAnalog Studies, Arctic / Antarctic / Alpine, Away Teams & Field Reports, Biosignatures & Paleobiology, Cryobiology, Dale Andersen's Field Reports, Exploration Gear & Tech, Extremeophiles and Extreme Environments, Habitable Zones, Icy Worlds, Status Report, Video, Audio, Webcasts, Podcasts, Water/Hycean Worlds & Oceanography
Video: Astrobiologists Diving Under The Ice In Antarctica: Getting Out of the Water
Dale Andersen: Our research in the perennially ice-covered lakes of Antarctica involves long, hard days, but they are always fun and exciting.
Posted inAstrobiology (general), Biogeochemical Cycles & Geobiology, Extremeophiles and Extreme Environments
Weird Arsenic-Eating Microbes Discovered? Yes. Finding E.T.? No.
NASA-Funded Astrobiology Research Discovers Earth Life Built With Arsenic, NASA “NASA-funded astrobiology research has changed the fundamental knowledge about what comprises all known life on Earth. Researchers conducting tests in […]
Posted inAstrobiology (general), Biogeochemical Cycles & Geobiology, Extremeophiles and Extreme Environments
Arsenic-Based Life Found on Earth
Astrobiologists: Deadly arsenic breathes life into organisms, Arizona State University “Evidence that the toxic element arsenic can replace the essential nutrient phosphorus in biomolecules of a naturally occurring bacterium expands […]
Posted inAstrochemistry, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Extremeophiles and Extreme Environments, Habitable Zones, Microbiology & Virology, Press Release
NASA-Funded Astrobiology Research Discovers Earth Life Built With Arsenic
NASA-funded astrobiology research has changed the fundamental knowledge about what comprises all known life on Earth. Researchers conducting tests in the harsh environment of Mono Lake in California have discovered […]
Posted inArctic / Antarctic / Alpine, Dale Andersen's Field Reports, Extremeophiles and Extreme Environments, Microbiology & Virology, Polar / Alpine Expeditions
Looking for Endolithic Organisms on Mt. Everest
One of the things Scott Parazynski will be looking or during his ascent of Mt. Everest is evidence of habitable zones for microorganisms. Given the low temperatures, air pressure, high […]
Posted inAnalog Studies, Arctic / Antarctic / Alpine, Atmospheres, Climate, Weather, Away Teams & Field Reports, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Cryobiology, Dale Andersen's Field Reports, Exploration Gear & Tech, Icy Worlds, Imaging & Spectroscopy, Microbiology & Virology, Status Report, Tricorders & Sensors
In Situ Measurements of Atmospheric Methane at Lake Untersee, Antarctica
Methane (CH4) is an important greenhouse gas in the Earth’s atmosphere, accounting for approximately 20% of the observed greenhouse effect. With an atmospheric lifetime of about ten years, methane levels […]
Posted inCryobiology
A Survivor in Greenland: A Novel Bacterial Species is Found Trapped in 120,000-Year-Old Ice
[Penn State]. A team of Penn State scientists has discovered a new ultra-small species of bacteria that has survived for more than 120,000 years within the ice of a Greenland […]