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Latest Hadean Stories

cfa24e4372383220e6a57ea5917fe81f
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...

969e5d7cd5f6cb8fa862644c0e83fc201
2005-09-16 10:45:09

Arizona -- University of Arizona and Japanese scientists are convinced that evidence at last settles decades-long arguments about what objects bombarded the early inner solar system in a cataclysm 3.9 billion years ago. Ancient main belt asteroids identical in size to present-day asteroids in the Mars-Jupiter belt -- not comets -- hammered the inner rocky planets in a unique catastrophe that lasted for a blink of geologic time, anywhere from 20 million to 150 million years, they report in...

55e600a83ed482ef21e4ecec14811226
2005-06-03 17:50:00

NASA -- Research funded partly by NASA has confirmed the existence of liquid water on the Earth's surface more than 4 billion years ago. Scientists have found that the Earth had formed patterns of crust formation, erosion and sediment recycling as early as 4.35 billion years ago. Their findings came during a study of zircon crystals formed during the earliest period of Earth's history, the Hadean Eon (4.5 billion to 4.0 billion years ago). "NASA is interested in how early the Earth had...

d512a7cf15669f5aae1da3b09441afb41
2005-05-06 07:27:49

TROY, N.Y. -- Researchers at Rensselaer Polytechnic Institute and Australian National University have found new evidence that environmental conditions on early Earth, within 200 million years of solar system formation, were characterized by liquid-water oceans and continental crust similar to those of the present day. The researchers developed a new thermometer that made the discovery possible. "Our data support recent theories that Earth began a pattern of crust formation, erosion, and...


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
virgule
  • A punctuation mark (/) used to separate related items of information.
  • A little rod; a twig.
This word comes from the Late Latin 'virgula,' accentual mark, a diminutive of 'virga,' rod.
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