News tagged with oxygen level
Bubble-propelled microrockets could operate in the human stomach
(PhysOrg.com) -- Recently, researchers have been designing a wide variety of self-propelled micromotors, many of which operate using an oxygen-bubble propulsion mechanism that requires a high concentration ...
Jan 18, 2012 |
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Scientists find microbes in lava tube living in conditions like those on Mars
(PhysOrg.com) -- A team of scientists from Oregon has collected microbes from ice within a lava tube in the Cascade Mountains and found that they thrive in cold, Mars-like conditions.
Space & Earth / Space Exploration
Dec 15, 2011 |
4.8 / 5 (17) |
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Study shows humans still evolving
(PhysOrg.com) -- A new study published in the Proceedings of the National Academy of Sciences provides evidence of human evolution and rapid genetic changes suggesting that, contrary to modern claims, technological and cu ...
Oct 04, 2011 |
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'Air laser' may sniff bombs, pollutants from a distance (w/ Video)
Princeton University engineers have developed a new laser sensing technology that may allow soldiers to detect hidden bombs from a distance and scientists to better measure airborne environmental pollutants ...
Jan 28, 2011 |
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Plants kick-start evolutionary drama of Earth's oxygenation
An international team of scientists, exploiting pioneering techniques at Arizona State University, has taken a significant step toward unlocking the secrets of oxygenation of the Earth's oceans and atmosphere.
Space & Earth / Earth Sciences
Oct 08, 2010 |
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How plants drove animals to the land
(PhysOrg.com) -- A new study of ancient oxygen levels presents the first concrete evidence that after aquatic plants evolved and boosted the levels of oxygen aquatic life exploded, leading to fierce competition ...
Other Sciences / Archaeology & Fossils
Sep 30, 2010 |
4.7 / 5 (11) |
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Tibetan adaptation to high altitude occurred in less than 3,000 years
(PhysOrg.com) -- A comparison of the genomes of 50 Tibetans and 40 Han Chinese shows that ethnic Tibetans split off from the Han less than 3,000 years ago and since then rapidly evolved a unique ability to thrive at high ...
Jul 01, 2010 |
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Vitamin B3 Controls Important Life Processes by Changing Shape in Response to Oxygen Level
(PhysOrg.com) -- Scientists have obtained the first images of a common molecular signal, vitamin B3, which plays a role in making some bacteria potent and some men impotent.
Jun 07, 2010 |
4.4 / 5 (7) |
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Did Phosphorus Trigger Complex Evolution -- and Blue Skies?
(PhysOrg.com) -- The evolution of complex life forms may have gotten a jump start billions of years ago, when geologic events operating over millions of years caused large quantities of phosphorus to wash ...
Space & Earth / Earth Sciences
May 10, 2010 |
4.8 / 5 (15) |
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Gators Breathe Like Birds: Did Dinosaurs’ Ancestors Inhale Their Way To Dominance?
University of Utah scientists discovered that air flows in one direction as it loops through the lungs of alligators, just as it does in birds. The study suggests this breathing method may have helped the ...
Other Sciences / Archaeology & Fossils
Jan 14, 2010 |
4.5 / 5 (11) |
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Cockroaches Control Their Breathing to Save Water
(PhysOrg.com) -- Many insects have been known for decades to hold their breath when resting, but the reasons have not been well understood. A new study on cockroaches suggests the insects reduce their breathing ...
Sep 24, 2009 |
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Ancient oceans offer new insight into the origins of animal life
(PhysOrg.com) -- Analysis of a rock type found only in the world's oldest oceans has shed new light on how large animals first got a foothold on the Earth.
Space & Earth / Earth Sciences
Sep 09, 2009 |
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Explosive growth of life on Earth fueled by early greening of planet
Earth's 4.5-billion-year history is filled with several turning points when temperatures changed dramatically, asteroids bombarded the planet and life forms came and disappeared. But one of the biggest moments ...
Space & Earth / Earth Sciences
Jul 08, 2009 |
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New bacterium forms intracellular minerals
A new species of photosynthetic bacterium has come to light: it is able to control the formation of minerals (calcium, magnesium, barium and strontium carbonates) within its own organism. Published in Science on Apr ...
May 11, 2012 |
5 / 5 (3) |
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When dinosaurs roamed a fiery landscape
The dinosaurs of the Cretaceous may have faced an unexpected hazard: fire! In a paper published online today, researchers from Royal Holloway University of London and The Field Museum of Natural History in Chicago have shown ...
Other Sciences / Archaeology & Fossils
Mar 29, 2012 |
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