View Full Version : Is Methane Evidence of Life on Mars?

2005-Sep-06, 09:49 PM
SUMMARY: Is the discovery of methane in Mars' atmosphere the first direct evidence of extraterrestrial life? Extraordinary claims require extraordinary evidence, so scientists are working to figure out what it will take to know for sure. The best way to know for sure will be to analyze the ration of carbon-12 to carbon-13. Living creatures prefer to pick up carbon-12 as they assemble methane, so a larger amount of this isotope will be a telltale sign. Unfortunately, detecting this isotope is best done by spectrometers on the surface of Mars, so future landers/rovers with more sensitive instruments will be required.

View full article (http://www.universetoday.com/am/publish/methane_first_direct_sign_for_et_life.html)
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