Good points, Tony. Life on Earth is incredibly tenacious. Try to get rid of a termite infestation or fire ant colonies in the Southern US, and you'll get a feel for the kind of firepower (poisons, denial of habitat) that it entails. I would not want to live in a house that had been tented and saturated with poisons to kill termites! I live in the frigid north (in Maine) and even with the long sub-zero winters, organisms manage to adapt and thrive. We have molds, spores, aquatic organism infestations (red tide is currently crippling the clamming/mussel trade), and invasive water plants, etc, that are seemingly impossible to defend against or even moderate slightly. Every ecological niche that can be expoited is exploited. If Earth is any example, life that arises anywhere will conform and adapt to diversities and it will survive anything less than a planetary catastrophe. I am rather optimistic about the existence of extraterrestrial life, although the survival value of intelligence is a huge wild card. Intelligence gives humans lots of advantages in learned behavior and adaptability, but cockroaches currently hold the gold medal in species longevity, and they may have the last laugh.tony873004 said:As far as simple life, I would guess it's all over the place. Look at how well it adapts on Earth. If I don't take my laundry out of the machine for 2 days, it stinks of mold. If I don't weed my garden every few weeks, it becomes overgrown. Grass grows from the cracks in the sidewalk, green stuff grows on my shower walls. The Galileo Spacecraft sent to Jupiter, even after existing over a decade in a vacuum with no protection from radiation needed to be crashed into Jupiter to avoid contanimating Europa with life.
Earth's biosphere is flooded with life, from deep below the surface to nearly the top of the atmosphere.
It's difficult to imagine that all other planets would have the opposite problem.
That's funny because it is estimated that there are 100 billion galaxies, so howcome this galaxy would be special and have two species when barely any others would?Mental Gridlock said:The drake equation is meaningless. It's completely arbitrary with a margin of error through the roof.
I vote 1 in this galaxy, and 1000+ in the universe.