A Third of Mars Could Have Been Underwater 167
Matt_dk writes "An international team of scientists who analyzed data from the Gamma Ray Spectrometer onboard NASA's Mars Odyssey reports new evidence for the controversial idea that oceans once covered about a third of ancient Mars.
'We compared Gamma Ray Spectrometer data on potassium, thorium and iron above and below a shoreline believed to mark an ancient ocean that covered a third of Mars' surface, and an inner shoreline believed to mark a younger, smaller ocean.'"
Potassium Salts (Score:5, Informative)
Re:Why water? (Score:2, Informative)
Re:To prove it... (Score:4, Informative)
Re:What is The Truth about Mars? (Score:3, Informative)
Whatever caused the devastation on Mars, could be avoided on Earth with the correct approach to discovering the truth.
Mars is devistated?
Mars has no water/atmosphere because A)It is small and B)It lacks a magnetosphere (which is because its core has cooled which is 1) because it is small and 2) because it lacks a large moon). With no pressure, water sublimates. With no tectonic activity to introduce more, and less gravity to attract more from space, it dried up. Distance+no greenhousing also means its cold.
For the reasonable future, Earth has none of these problems. Our current threat is "random catastrophy" or "runaway greenhouse" (look at Venus, not Mars). If we get past those, then we can worry about (as mentioned by someone else) the increasing luminosity of the sun.