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Latest valley networks Stories

Mars Water May Have Come From Orographic Precipitation
2013-07-24 06:49:15

redOrbit Staff & Wire Reports - Your Universe Online Orographic precipitation, or rain and snow that falls when moist prevailing winds are forced upwards by mountain ridges, appears to have played a role in the formation of some Martian valleys, researchers from Brown University in Rhode Island report in a recently published study. While the valley networks that cover the surface of the Red Planet provide strong evidence water once flowed on Mars, the source of that ancient water...

Using Math To Better Understand River, Valley Networks
2012-12-06 16:23:13

Lee Rannals for redOrbit.com — Your Universe Online Researchers wrote in a paper published in the Proceedings of the National Academy of Sciences (PNAS) that they have used math to explain different characteristics of river and valley networks. Rivers and valleys form intricate branching patterns, which have inspired some scientists to develop a theoretical understanding of river-network geometry. MIT scientists have created a mathematical theory to discover a common...

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2009-11-23 08:45:00

Findings add to evidence for ancient Martian ocean New research adds to the growing body of evidence suggesting the Red Planet once had an ocean. In a new study, scientists from Northern Illinois University and the Lunar and Planetary Institute in Houston used an innovative computer program to produce a new and more detailed global map of the valley networks on Mars. The findings indicate the networks are more than twice as extensive (2.3 times longer in total length) as had been previously...

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2008-09-09 14:05:00

A new study suggests that ancient features on the surface of Mars called valley networks were carved by recurrent floods during a long period when the Martian climate may have been much like that of some arid or semiarid regions on Earth. An alternative theory that the valleys were carved by catastrophic flooding over a relatively short time is not supported by the new results. Often cited as evidence that Mars once had a warm environment with liquid water on the surface, valley networks are...


Word of the Day
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'