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oxygen levels on early earth rose, fell several times before great oxidation eve




image: the jeerinah formation in western australia, where a uw-led team found a sudden shift in nitrogen isotopes. "nitrogen isotopes tell a story about oxygenation of the surface ocean, and this... view more credit: roger buick / university of washingtonearth's oxygen levels rose and fell more th...



early earth had a hazy, methane-filled atmosphere




a new research paper describes a period more than 2.4 billion years ago, when earth's atmosphere was filled with a thick, methane-rich haze much like saturn's moon titan, seen here in an image taken by nasa's cassini spacecraft in 2013. credit: nasa/jpl-caltech/space science institutemore than 2.4 b...



less life: limited phosphorus recycling suppressed early earth's biosphere




image: as earth's oxygen levels rose to near-modern levels over the last 800 million years, phosphorus levels increased, as well, according to modeling led by the uw's michael kipp and others.... view more credit: michael kipp / university of washingtonthe amount of biomass - life - in earth's anc...



two-billion-year-old salt rock reveals rise of oxygen in ancient atmosphere




a 2-billion-year-old chunk of sea salt provides new evidence for the transformation of earth's atmosphere into an oxygenated environment capable of supporting life as we know it. the study by an international team of institutions including princeton university found that the rise in oxygen that occu...



photosynthesis before oxygen may have kept the early earth warm




photosynthesis.petr pakandl / wikicommonsshare this story“the so-called ‘faint young sun paradox’ has long been a topic of debate because its resolution bears important ramifications for the basic factors structuring climate regulation and the long-term habitability of earth and earth-like exo...



world's oldest known oxygen oasis discovered




in the earth's early history, several billion years ago, only traces of oxygen existed in the atmosphere and the oceans. today's air-breathing organisms could not have existed under those conditions. the change was caused by photosynthesizing bacteria, which created oxygen as a by-product – in vas...



two-billion-year-old salt rock reveals rise of oxygen in ancient atmosphere




a sample of 2-billion-year-old salt (pink-white recrystallized halite) with embedded fragments of calcium sulfate from a geological drill core in russian karelia. credit: aivo lepland, geological survey of norway; courtesy of science/aaasa 2-billion-year-old chunk of sea salt provides new evidence f...



presstv-global warming harming marine life: studies




global warming is making the world's oceans sicker, depleting them of oxygen and harming delicate coral reefs more often, two studies show.the lower oxygen levels are making marine life far more vulnerable, the researchers said. oxygen is crucial for nearly all life in the oceans, except for a few m...



scientists find oxidized iron deep within the earth's interior




scientists digging deep into the earth's mantle recently made an unexpected discovery.five hundred and fifty kilometres below the earth's surface, they found highly oxidized iron, similar to the rust we see on our planet's surface, within garnets found within diamonds.the result surprised geoscienti...



in broadest view yet of world's low oxygen, scientists reveal dangers and soluti




in the past 50 years, the amount of water in the open ocean with zero oxygen has gone up more than fourfold. in coastal water bodies, including estuaries and seas, low-oxygen sites have increased more than 10-fold since 1950. scientists expect oxygen to continue dropping even outside these zones as ...



this enzyme enabled life to conquer a hostile earth




computers are simulating the ancestral versions of the most common protein on earth, giving scientists an unparalleled look at early life's development of harnessing energy from the sun and production of oxygen.



a popular tool to trace earth's oxygen history can give false positives




sedimentary rock layers chronicling earth's geological history. credit: georgia tech / yale / reinhard / planavskyfor researchers pursuing the primordial history of oxygen in earth's atmosphere, a new study might sour some "eureka!" moments. a contemporary tool used to trace oxygen by examining anci...



unexpected oxidation state for molecular plutonium discovered




image: scientists from los alamos national laboratory and the university of california -- irvine are exploring a new oxidation state of plutonium. view more credit: lanllos alamos, n.m., march 9, 2017--researchers at los alamos national laboratory in collaboration with the university of california ...



tiny bubbles of oxygen got trapped 1.6 billion years ago




fossilized bubbles and cyanobacterial fabric from 1.6 billion-year-old phosphatized microbial mats from vindhyan supergroup, central india. credit: stefan bengtson.take a good look at these photos: they show you 1.6 billion years old fossilized oxygen bubbles, created by tiny microbes in what was on...



study suggests hydrogen, oxygen, water and carbon dioxide generated in earth's m




research from the university of texas at arlington and the wadia institute of himalayan geology suggests that hydrogen, oxygen, water and carbon dioxide are being generated in the earth's mantle hundreds of kilometers below the earth's surface.



did extreme fluctuations in oxygen, not a gradual rise, spark the cambrian explo




boulder, colo., usa: five hundred and forty million years ago, during the cambrian period, life suddenly went nuts. "blossomed" is far too mild a word: instead, geologists call this sudden diversification an "explosion." but what exactly sparked the cambrian explosion?now, a new study suggests that ...



when water met iron deep inside the earth, did it create conditions for life?




image: an illustration from the paper showing oxygen and hydrogen cycling in the deep earth. view more credit: from the team's paper.washington, dc -- reservoirs of oxygen-rich iron between the earth's core and mantle could have played a major role in earth's history, including the breakup of supe...



decreased oxygen levels could present hidden threat to marine species




species living in coastal regions could face a significant future threat from reduced levels of oxygen in the marine environment, according to research published in nature scientific reports.



world's first animals caused global warming




the evolution of earth's first animals more than 500 million years ago caused global warming, new research shows. some 520-540 million years ago, animal life evolved in the ocean and began breaking down organic material on the seafloor, leading to more carbon dioxide and less oxygen in the atmospher...



bubbles of life from the past




image: fossilized bubbles and cyanobacterial fabric from 1.6 billion-year-old phosphatized microbial mats from vindhyan supergroup, central india. credit: stefan bengtson. view more credit: stefan bengtsontake a good look at these photos: they show you 1.6 billion years old fossilized oxygen bubbl...



a popular tool to trace earth's oxygen history can give false positives




image: it's relatively simple to take a chromium isotope reading on a rock sample. first, crush the sample. second, dissolve the pulverized rock in acid. then place the solution in a... view more credit: georgia tech / christopher moorefor researchers pursuing the primordial history of oxygen in e...



world's first animals caused global warming




credit: cc0 public domainthe evolution of earth's first animals more than 500 million years ago caused global warming, new research shows. some 520-540 million years ago, animal life evolved in the ocean and began breaking down organic material on the seafloor, leading to more carbon dioxide and les...



decades of data on world's oceans reveal a troubling oxygen decline




global map of the linear trend of dissolved oxygen at the depth of 100 meters. credit: georgia techa new analysis of decades of data on oceans across the globe has revealed that the amount of dissolved oxygen contained in the water - an important measure of ocean health - has been declining for more...



faster, cheaper wastewater treatment through improved oxidation reactions




uc riverside researchers have shown that adding an inexpensive co-catalyst can dramatically improve the speed and efficiency of advanced oxidation processes (aops). credit: uc riversideresearchers at the university of california, riverside have discovered a method to dramatically improve the way pol...



when water met iron deep inside the earth, did it create conditions for life?




reservoirs of oxygen-rich iron between the earth's core and mantle could have played a major role in earth's history, including the breakup of supercontinents, drastic changes in earth's atmospheric makeup, and the creation of life, according to recent work from an international research team publis...