News tagged with early earth
Related topics: earth
Tiny 'spherules' reveal details about Earth's asteroid impacts
(Phys.org) -- Researchers are learning details about asteroid impacts going back to the Earth's early history by using a new method for extracting precise information from tiny "spherules" embedded in layers ...
Space & Earth / Earth Sciences
Apr 25, 2012 |
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First life may have arisen above serpentine rock, researchers say
(PhysOrg.com) -- About 3.8 billion years ago, Earth was teeming with unicellular life. A little more than 4.5 billion years ago, the Earth was a ball of vaporous rock. And somewhere in between, the first organisms ...
Space & Earth / Earth Sciences
Sep 23, 2011 |
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Tiny 3-D images shed light on origin of Earth's core
(PhysOrg.com) -- A new method of capturing detailed, three-dimensional images of minute samples of material under extreme pressures is shedding light on the evolution of the Earth's interior. Early results ...
Dec 16, 2010 |
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Early Earth haze likely provided ultraviolet shield for planet
A new study shows a thick organic haze that enshrouded early Earth several billion years ago may have been similar to the haze now hovering above Saturn's largest moon, Titan, and would have protected primordial ...
Space & Earth / Earth Sciences
Jun 03, 2010 |
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Professor: We have a 'moral obligation' to seed universe with life
(PhysOrg.com) -- Eventually, the day will come when life on Earth ends. Whether that’s tomorrow or five billion years from now, whether by nuclear war, climate change, or the Sun burning up its fuel, the last ...
Feb 09, 2010 |
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Ancient ocean chemistry: Effects of biological oxygen production 100 million years before it accumulated in atmosphere
(PhysOrg.com) -- Scientists widely accept that around 2.4 billion years ago, the Earth's atmosphere underwent a dramatic change when oxygen levels rose sharply. Called the "Great Oxidation Event" (GOE), the ...
Space & Earth / Earth Sciences
Oct 29, 2009 |
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Banded rocks reveal early Earth conditions, changes
(PhysOrg.com) -- The strikingly banded rocks scattered across the upper Midwest and elsewhere throughout the world are actually ambassadors from the past, offering clues to the environment of the early Earth ...
Space & Earth / Earth Sciences
Oct 11, 2009 |
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Scientists propose new hypothesis on the origin of life
The Miller-Urey experiment, conducted by chemists Stanley Miller and Harold Urey in 1953, is the classic experiment on the origin of life. It established that the early Earth atmosphere, as they pictured it, ...
Space & Earth / Earth Sciences
Sep 04, 2009 |
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New finding affects understanding of formation of the solar system
(PhysOrg.com) -- A global collaboration including five University of Notre Dame researchers has revised the half-life of samarium-146 (146Sm), reducing it to 68 million years from 103 million years. The finding ...
Apr 02, 2012 |
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Differences in tungsten isotopes show Earth surface formed unevenly
(PhysOrg.com) -- Many versions of early Earth history offer visions of a hot melting mix of materials which would have resulted, after cooling, in a smooth blend of ingredients, much a like a cake after beating ...
Space & Earth / Earth Sciences
Feb 17, 2012 |
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'Baby fat' on the young sun?
To deal with the faint young Sun paradox, researchers are taking a fresh look at an old idea: that the Sun started out larger and more luminous than we thought.
Feb 14, 2012 |
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Early Earth may have been prone to deep freezes: study
Two University of Colorado Boulder researchers who have adapted a three-dimensional, general circulation model of Earth's climate to a time some 2.8 billion years ago when the sun was significantly fainter than present think ...
Space & Earth / Earth Sciences
Dec 05, 2011 |
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Rise of atmospheric oxygen more complicated than previously thought
The appearance of oxygen in the Earth's atmosphere probably did not occur as a single event, but as a long series of starts and stops, according to an international team of researchers who investigated rock ...
Space & Earth / Earth Sciences
Dec 01, 2011 |
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Setting the stage for life: Scientists make key discovery about the atmosphere of early Earth
Scientists in the New York Center for Astrobiology at Rensselaer Polytechnic Institute have used the oldest minerals on Earth to reconstruct the atmospheric conditions present on Earth very soon after its birth. The findings, ...
Space & Earth / Earth Sciences
Nov 30, 2011 |
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Rare near-Earth asteroid fly-by set for Tuesday
A massive asteroid will make a rare fly-by Tuesday, and although it poses no danger of crashing to Earth, US scientists said this week they are looking forward to getting a closer look.
Space & Earth / Space Exploration
Nov 03, 2011 |
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