In the harsh Arctic environments, ice-dwelling diatoms remarkably survive and thrive, but their behavioral adaptations are poorly understood.
The detection of viable life is a key objective for both in situ astrobiological experiments on extraterrestrial bodies, and for planetary protection protocols on Earth following sample return.
Gossans are formed through the oxidation of sulfide ore deposits by fluids, such as meteoric water or hydrothermal solutions, leading to locally acidic conditions.
Viruses in the cold waters of the Arctic are strongly seasonal and are also detected in the Antarctic.
![Site locations and hypothesized pan-Arctic glaciation. ODP Site 910 and MD99-2277 (red dots) are located in the Eurasian sector of the Arctic Ocean and central Nordic Seas, respectively. Site 910 lies just beyond the margins of the maximum MIS 2 Eurasian ice sheets [gray dashed line; based on (51)], while MD99-2277 was simultaneously covered by sea ice. However, both sites are hypothesized to have been fully glaciated under the maximum pan-Arctic ice sheet extent (white shaded extent with blue flow lines) proposed by Hughes et al. (75) [modified from Jakobsson et al. (7) and Geibert et al. (3)]. - Science Advances](https://i0.wp.com/astrobiology.com/wp-content/uploads/2025/07/Ice-World-Oceanography-The-Arctic.png?resize=1200%2C718&ssl=1)
For years, scientists have debated whether a giant thick ice shelf once covered the entire Arctic Ocean during the coldest ice ages.
Glaciers are important regulators of the Earth’s climate system, affecting the hydrological cycle, energy balance and the development of downstream ecosystems. Other than the polar regions, the Tibetan Plateau stands […]
In the State of the Cryosphere 2024 – Lost Ice, Global Damage report, over 50 leading cryosphere scientists warn of vastly higher impacts and costs to the global economy given […]
Astrobiology.com Editor’s note: Recently the Fram2 mission took four astronaut explorers on an orbital path that covered both of our planet’s polar regions. This was the fist human mission to […]
Last weekend Astrobiologist and polar explorer Dale Andersen received the prestigious Explorers Club Finn Roone Memorial Award.
Reducing the rates and impacts of biological invasions is a major policy goal of international biodiversity agreements.
