Extraterrestrial life may well be so weird we would not immediately recognize it, and scientists looking for alien life should be seeking the unfamiliar as well as the familiar, experts advised.
They said Friday that NASA'S current approach to "follow the water" works well if the assumption is that life everywhere is just like life is on Earth--based on water, carbon and DNA.
But the "life as we know it" approach could easily miss something exotic, the National Academy of Sciences panel advised.Duh.
Why must humans assume that all life in the universe (which is something we know very little about anyway) must be similar to life on Earth?
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