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Latest Late Heavy Bombardment Stories

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...

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2009-05-18 15:45:00

Meteorites provide valuable information about the early history of the solar system. A group of Swiss geologists have conducted systematic meteorite searches in Oman since 2001, and they recently returned from their latest hunt.Most meteorites are fragments of asteroids, some of which contain organic matter. Some meteorites preserve information on the chemical make-up of the solar system before the planets formed. Other meteorites are impact debris from the surfaces of the Moon and Mars....

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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...

2007-12-17 08:29:42

There are hundreds of thousands of asteroids circling our sun, all so-called "minor planets" left over from the formation of the solar system. Much about them remains mysterious. Solving these mysteries could shed light on the past, present and future of cosmic impacts on Earth. Among the puzzles: Missing asteroids There should be far more asteroids that resemble Vesta, the second largest body in the asteroid belt. The outermost layers of Vesta are composed mostly of basaltic rock—the...

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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...

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2005-05-26 00:50:00

Astrobiology Magazine -- People of every culture have been fascinated by the dark "spots" on the Moon, which seem to compose the figure of a rabbit, frogs or the face of a clown. With the Apollo missions, scientists found that these features are actually huge impact basins that were flooded with now-solidified lava. One surprise was that these basins formed relatively late in the history of the early solar system -- approximately 700 million years after the formation of the Earth and...


Word of the Day
jument
  • A beast of burden; also, a beast in general.
'Jument' ultimately comes from the Latin 'jugum,' yoke.
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