“Jim Green, NASA’s retiring chief scientist, spoke with The New York Times about one of his most significant recent proposals, a scale for verifying the detection of alien life, called the “Confidence of Life Detection” (CoLD) scale.
The scale ranges from one, meaning no life is found, to seven, meaning “we found life.”
The reason we need such a scale, said Green, is that it shows the chances of verifying life on these planets, and, as such, can predict whether the possibility of terraforming, or making them habitable for humans, exists.
Regarding Mars, which is only at a CoLD Level 3, Green told The New York Times that “if a scientist came to me and said, ‘Here’s an instrument that will make it a CoLD Level 4,’ I’d fund that mission in a minute. They’re not jumping to seven, they’re making that next big step, the right step, to make progress to actually finding life in the solar system.”
The difference between the start of the search for life on Mars, beginning with the Viking 1 and 2 landers in 1976, and what we’re doing now is that the current research is much more methodical and much more intelligent in how we recognize “what signatures life can produce over time,” said Green.” Newsmax
Comment: Hopefully, hopefully. pl