We need to broaden our definition of life

Want to Find Aliens? Look for More than Just Earth-Like Planets

They talk about producing a “Planetary Habitability Index” based more on the known extremes of life as found here on Earth. I like that idea as I feel quite confident that anywhere there is liquid water, temperature gradients and an assortment of carbon and minerals, life of some sort will form. I strongly suspect life is ubiquitous in our universe, though intelligent life (like there is any on Earth ;-)) might be extraordinarily rare.

Author: Tfoui

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