Featured Image: Rock fracture from the Dresser Formation, Australia. Fluid inclusions are trapped in the white stripes. Image courtesy Ser Amantio di Nicolao, used with permission.
Paper: Ingredients for microbial life preserved in 3.5 billion-year-old fluid inclusions
Authors: Helge Mißbach, Jan-Peter Duda, Alfons M. van den Kerkhof, Volker Lüders, Andreas Pack, Joachim Reitner, Volker Thiel
Just a few weeks ago NASA made a historic landing of the Perseverance rover on Mars. This rover symbolizes our human drive for exploration and the need to find the origins of life to answer the big question—are we alone in the universe? In addition to extraterrestrial investigation and research, we can address this fundamental question here on our own planet by digging into extreme environments that are analogs for ancient Earth or other planets. These unusual environments, such as hydrothermal vents in our deepest oceans, boiling hot springs in Yellowstone, and prehistoric lakes in South America, can give us glimpses of ancient information and clues about to the ingredients of life. By discovering our own origins of life, we can begin to understand how it may evolve on other planets.
Continue reading “Prehistoric Microbial Meals Found in the Australian Outback”
Featured Image: Small headwater stream in Oregon’s Mountains. Image courtesy Jessica Buser-Young, used with permission.
Paper: The River Continuum Concept
Authors: Robin L. Vannote, G. Wayne Minshall, Kenneth W. Cummins, James R. Sedell, Colbert E. Cushing
Perhaps last time you went for a hike, you stumbled upon a burbling spring pushing its way up through the leaf litter after a heavy rainfall, creating a tiny rivulet of water crisscrossing over your path before plunging back into the forest. What a find! Excitedly, you squatted down and gently uncovered the spring to notice gnats lazily floating away, some nearby fruiting mushrooms, and great clumps of decomposing twigs and leaves which you assume harbor uncountable numbers of microorganisms. This unique little ecosystem is profiting from the nutrients and water being pushed from the ground, using the opportunity to have a feast. But what happens to the nutrients and carbon that gets past these plants and animals?
Continue reading “Mosaics of Life Along a River”
Featured Image: Fractured sea ice. Image courtesy Pink Floyd 88 a, accessed through Wikimedia Commons GNU Free Documentation License
Paper: Elevated sources of cobalt in the Arctic Ocean
Authors: Randelle Bundy, Alessandro Tagliabue, Nicholas Hawco, Peter Morton, Benjamin Twining, Mariko Hatta, Abigail Noble, Mattia Cape, Seth John, Jay Cullen, Mak Saito
Imagine navigating the Beaufort Sea to the North Pole, crossing icy and treacherous waters through the untamed North, all to chase a metal that is so rare that you have a better chance of finding 5 grains of sand in an Olympic swimming pool*. This is exactly what Bundy et al. accomplished in their work identifying cobalt amounts in the Arctic Ocean and how these amounts vary based on ocean depth, distance from land, and over a time period of 6 years.
Continue reading “Unveiling the Mysterious Patterns of Arctic Cobalt”