Where Did the Organic Molecules Found on Mars Come From?
Organic Molecules Found on Mars ( Tek-THinK)
NASA’s has reported that the Mars Curiosity rover has measured a tenfold spike in methane as well as detected other organic molecules in a rock-powder sample collected by the robotic laboratory’s drill.
“This temporary increase in methane — sharply up and then back down — tells us there must be some relatively localized source,” said Sushil Atreya of the University of Michigan, Ann Arbor, a member of the Curiosity rover science team.
There are many possible sources, biological or non-biological, such as interaction of water and rock.
Researchers used Curiosity’s onboard Sample Analysis at Mars (SAM) laboratory a dozen times in a 20-month period to sniff methane in the atmosphere. During two of those months, in late 2013 and early 2014, four measurements averaged seven parts per billion. Before and after that, readings averaged only one-tenth that level.
Curiosity also detected different Martian organic chemicals in powder drilled from a rock dubbed Cumberland, the first definitive detection of organics in surface materials of Mars. These Martian organics could either have formed on Mars or been delivered to Mars by meteorites.