We have performed a stratigraphic and mineralogical analysis of a vertical transect across a ridge located at the distal end of a system of eroded alluvial deposits in the northern […]
Biogeochemical Cycles & Geobiology
Dusty Iron in the Ancient Oceans
A recent study examines the affect of dust-borne iron on primary productivity in the oceans of the ancient Earth.
Ocean Anoxia during a Biocrisis on the Ancient Earth
A recent study provides new constraints on the timing of ocean anoxia during the Smithian-Spathian boundary (SSB), which represents a period of ‘biocrisis’ for Earth’s marine ecosystems as they recovered […]
Geoscientists Document 300 Million Year Old Atmospheric Dust
Dust plays a crucial role in the life and health of our planet. In our modern world, dust-borne nutrients traveling in great dust storms from the Saharan Desert fertilize the […]
Hunting for Alien Life at the Bottom of the Arctic Ocean
A team of oceanographers are heading out on a voyage of discovery this month, exploring in detail for the first time a hydrothermal vent field in the Arctic Ocean. They […]
Rethinking Sulfide in the Ancient Oceans
Researchers supported in part by the Exobiology Program have provided new information about the oxygenation history of the Earth’s oceans during the mid-Proterozoic using uranium (U) isotope data. The team […]
Atacama Desert Microbes May Hold Clues To Life On Mars
Microbial life on Mars may potentially be transported across the planet on dust particles carried by wind, according to a study conducted in the Atacama Desert in North Chile, a […]
Drop Of Ancient Seawater Rewrites Earth's History
The remains of a microscopic drop of ancient seawater has assisted in rewriting the history of Earth’s evolution when it was used to re-establish the time that plate tectonics started […]
Ultra-small Microbes Exhibit Extreme Survival Skills In Ethiopia's Mars-like Wonderland
The first study of ultra-small bacteria living in the extreme environment of Ethiopia’s Dallol hot springs shows that life can thrive in conditions similar to those thought to have been […]
Diamonds Reveal How Continents Are Stabilized – A Key to Earth's Habitability
The longevity of Earth’s continents in the face of destructive tectonic activity is an essential geologic backdrop for the emergence of life on our planet. This stability depends on the […]
