Mars Methane: Life at Last?
Mars is a tease.
It seems that discoveries hinting at life on the Red Planet are as recurrent as Kansas hay fever. Open up the science section of any periodical, and you’ll invariably trip across new research encouraging us to believe that somewhere, skulking in the vast, dry landscapes of that desolate world, are small, wiggling creatures — fellow inhabitants of the solar system.
Such enticing tidbits are nothing new. Their modern incarnation dates back to the early 1900s, when astronomer Percival Lowell promoted the existence of Martians who had trussed their planet with irrigation canals. This idea was well received by the public, but the astronomical community was at first skeptical, and eventually dismissive. By the First World War, these sluice-happy Martians were vaporware.
As the century ground on, additional see-saw arguments for martian life made regular appearances. In the 1970s, the Viking Landers, with the best science instrumentation NASA could launch, went looking for life in the martian dirt. The verdict was that they didn’t find any. But one member of the Viking biology team doesn’t agree. Was it a hit or a whiff? We still can’t say for —> Read More Here