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Latest Hadean Stories

Australian Rock Determined To Be Oldest Material Formed On Earth
2014-02-24 13:04:03

[ Watch the Video: The Oldest Rock On Earth ] Lee Rannals for redOrbit.com - Your Universe Online Researchers, publishing a paper in the journal Nature Geoscience, say a rock in Australia is helping to paint a picture of how our planet became habitable 4.4 billion years ago. The team found data from a tiny fragment of zircon that confirms the Earth’s crust first formed 4.4 billion years ago, which is just 160 million years after the formation of the Solar System. John Valley,...

Minerals Were Scarce When Life First Formed On Earth: Study
2013-11-26 08:05:20

redOrbit Staff & Wire Reports - Your Universe Online Just eight percent of the nearly 5,000 different types of minerals currently found on Earth were present on or near the planet’s surface when life first originated, according to new research published in the latest edition of the American Journal of Science. According to researchers from the Carnegie Institution for Science, life came about as a result of natural processes that took advantage of raw materials available during...

The Blue Planet's New Water Budget
2012-03-06 04:28:52

Investigating the history of water on Earth is critical to understanding the planet's climate. One central question is whether Earth has always had the same amount of water on and surrounding it, the same so-called "water budget". Has Earth gained or lost water from comets and meteorites? Has water been lost into space? New research into the Earth's primordial oceans conducted by researchers at the Natural History Museum of Denmark at the University of Copenhagen and Stanford University...

Scientists Make Key Discovery About Early Earth's Atmosphere
2011-12-01 04:55:26

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, which appear in the Dec. 1 edition of the journal Nature, are the first direct evidence of what the ancient atmosphere of the planet was like soon after its formation and directly challenge years of research on the type of atmosphere out of which life arose on the...

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2009-06-01 09:15:00

Large bombardments of meteorites approximately four billion years ago could have helped to make the early Earth and Mars more habitable for life by modifying their atmospheres, suggests the results of a paper published today in the journal Geochimica et Cosmochimica Acta. When a meteorite enters a planet's atmosphere, extreme heat causes some of the minerals and organic matter on its outer crust to be released as water and carbon dioxide before it breaks up and hits the ground. Researchers...

2009-05-20 15:40:15

A U.S. space agency-funded study suggests an intense asteroid bombardment nearly 4 billion years ago might have provided a boost for early life on Earth. The National Aeronautics and Space Administration said the research suggests the asteroids might not have sterilized the early Earth as completely as previously thought. The study focused on a particularly cataclysmic occurrence known as the Late Heavy Bombardment, or LHB, NASA said. This event occurred approximately 3.9 billion years ago...

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2009-05-20 13:40:00

The bombardment of Earth nearly 4 billion years ago by asteroids as large as Kansas would not have had the firepower to extinguish potential early life on the planet and may even have given it a boost, says a new University of Colorado at Boulder study. Impact evidence from lunar samples, meteorites and the pockmarked surfaces of the inner planets paints a picture of a violent environment in the solar system during the Hadean Eon 4.5 to 3.8 billion years ago, particularly through a...

db1d5ec6b552e092abb3ba1ab71c61c51
2009-02-17 11:20:38

The argument over whether an outcrop of rock in South West Greenland contains the earliest known traces of life on Earth has been reignited, in a study to be published in the Journal of the Geological Society on 23 February. The research, led by Martin J. Whitehouse at the Swedish Museum of Natural History, argues that the controversial rocks "Ëœcannot host evidence of Earth's oldest life', reopening the debate over where the oldest traces of life are located. The small island of...

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2008-11-27 09:44:55

Analysis of minerals in ancient magmas paints new picture of early Earth A new picture of the early Earth is emerging, including the surprising finding that plate tectonics may have started more than 4 billion years ago "” much earlier than scientists had believed, according to new research by UCLA geochemists reported Nov. 27 in the journal Nature. "We are proposing that there was plate-tectonic activity in the first 500 million years of Earth's history," said geochemistry professor...

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2008-07-02 18:55:00

A recent study has shown that tiny slivers of diamond forged on an infant Earth may contain the earliest traces of life. The crystals contain a form of carbon often associated with plants and bacteria. The researchers caution that their results are not definitive proof of early life but do "not exclude" the possibility. "We're all a little sceptical," said Dr Martin Whitehouse of the Swedish Museum of Natural History and one of the authors of the paper. If the study is proven to be true then...


Latest Hadean Reference Libraries

Geologic Clock With Events And Periods
2012-10-22 14:17:38

The Archean (formerly Archaeozoic) is a geologic eon between the Hadean and Proterozoic eons. The Archean Eon begins at roughly 3.8 billion years ago (Ga) and ends at about 2.5 Ga. But unlike all other geological ages, which are based on stratigraphy, The Archean eon is defined chronometrically. The lower boundary of 3.8 Ga has also not been officially recognized by the International Commission on Stratigraphy. The name Archean is derived from the ancient Greek (Arkhe), meaning...

Volcano_q
2012-06-26 19:51:17

The Hadean is the unofficial geological period of time that lies just before the Archean time period. The Hadean began with the formation of the Earth roughly 4.5 billion years ago (Ga) and ended about 3.8 Ga; the latter date varies according to different sources. Hadean is derived from Hades, Greek for “underworld,” referring to the hellish conditions on the planet at the time. The term was coined in 1972 by geologist Preston Cloud. The period was later classified as the “Priscoan...

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Word of the Day
attercop
  • A spider.
  • Figuratively, a peevish, testy, ill-natured person.
'Attercop' comes from the Old English 'atorcoppe,' where 'atter' means 'poison, venom' and‎ 'cop' means 'spider.' 'Coppa' is a derivative of 'cop,' top, summit, round head, or 'copp,' cup, vessel, which refers to 'the supposed venomous properties of spiders,' says the OED. 'Copp' is still found in the word 'cobweb.'
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