Featured Image: Shewanella putrefaciens CN-32 (a microbe capable of eating iron) on hematite (a rock containing iron). Image courtesy Environmental Molecular Sciences Laboratory (EMSL). Used with permission.
Paper: Organic matter mineralization in modern and ancient ferruginous sediments
Authors: André Friese, Kohen Bauer, Clemens Glombitza, Luis Ordoñez, Daniel Ariztegui Verena B. Heuer, Aurèle Vuillemin, Cynthia Henny, Sulung Nomosatryo, Rachel Simister Dirk Wagner, Satria Bijaksana, Hendrik Vogel, Martin Melles, James M. Russell, Sean A. Crowe, Jens Kallmeyer
Just as a crow may use a rock to crack a nut, certain microbes can use solid iron to crack open methane. This consumption limits the amount of methane lost from lakes into the atmosphere, making it a crucial process in mitigating production of greenhouse gasses. These microbes are abundant in freshwater sediments, and their specialized mechanism for cracking open methane is most likely one of the oldest metabolisms on Earth, providing a modern-day window into the past.
Continue reading “Rust to the Rescue?”
Featured image of a road in Death Valley in California by jplenio on Pixabay
Paper: Winter Precipitation Changes in California Under Global Warming: Contributions of CO2, Uniform SST Warming, and SST Change Patterns
Authors: L. Dong and L. R. Leung
As with any job tasked with predicting the future, climate scientists have a tough but important responsibility: understand how the climate will be different at the end of the century. Predicting future climate is especially critical in areas with large, vulnerable populations and that grow a large part of the food supply. California, for example, has a population of over 39 million and is a source of two-thirds of the fruits and one-third of the vegetables grown in the US. Changes to its climate will impact not only its own residents but also the population and economy of the whole country.
Continue reading “Will California get more precipitation in future winters?”
Featured Image: Artist’s impression of ESA’s ExoMars rover ‘Rosalind Franklin’ on the surface of Mars. Credit: ESA.
Paper: Oxia Planum: The Landing Site for the ExoMars “Rosalind Franklin” Rover Mission: Geological Context and Prelanding Interpretation
Authors: Quantin-Nataf et al., 2021
We are entering a new dawn of Mars exploration: Perseverance rover touched down on Mars earlier this year, which marks the start of what will be a decade-long effort to return samples from Mars. In 2022 the European Space Agency (ESA) will launch the ExoMars rover, which will team up with the ExoMars Trace Gas Orbiter (TGO) to find evidence of past or present life on Mars.
Continue reading “Oxia Planum: ExoMars 2022 Landing Site”
Paper: Amino acid abundances and compositions in iron and stony‐iron meteorites
Authors: Jamie E. Elsila, Natasha M. Johnson, Daniel P. Glavin, José C. Aponte, Jason P. Dworkin
All known life on Earth relies on amino acids. Many important biomolecules like proteins are made up of them. Scientists were surprised when they found these molecules, which are so strongly connected to living systems, in meteorites. How amino acids form in non-biological systems is still not entirely understood and is closely tied to the question of how life emerged on our young planet.
Continue reading “Are we star dust?”
Featured image: Soviet authorities investigate a mangled tent involved in the Dyatlov Pass Incident. This work is in the public domain and is not an object of copyright according to article 1259 of Book IV of the Civil Code of the Russian Federation No. 230-FZ of December 18, 2006.
Paper: Gaume, J., Puzrin, A.M. Mechanisms of slab avalanche release and impact in the Dyatlov Pass incident in 1959. Commun Earth Environ 2, 10 (2021). https://doi.org/10.1038/s43247-020-00081-8
In 1959, a group of nine hikers led by Igor Dyatlov trekked through the Ural Mountains in Eastern Russia on a skiing trip. After no word by telegram from the hikers for eight days, their families grew nervous and demanded a search and rescue effort. Over two weeks after the hikers planned contact with their base camp, investigators located an abandoned and mangled tent on the slope of Kholat Syakhl (“Dead Hill” in the local dialect of Mansi).
Continue reading “Geologists might have just solved a sixty year old Russian mystery”
Mid March 2021, I set out with 2 other wildlife enthusiasts to explore the Sundarbans delta in east India. The 3-hour journey from Kolkata city, on a busy road fringed by industrial towns tapered off at Gadkhali port – civilization’s last ‘land’ frontier before the largest continuous mangrove stretch in the world. We arrived after dusk, boarded our boat (with a crew of 2 naturalists, 3 boatmen, and a chef!), and were adrift upon dark waterways guided by twinkling village lights. In our haste, we thought little of just how ‘remote’ this wilderness was.
Continue reading “Adrift along the Sundarbans mangroves, east India”