Quote:
Originally Posted by joe Biggs
i disagree that there HAS to be other life besides on this earth.
we are so lucky to be exactly far away from our sun, exactly close enough to our unusually large moon, our solar system be exactly far away enough from any other stars, a non toxic and thick enough atmosphere to support life, water and stability for evolution
u think this is going to happen again in the universe
and even if a different form of life was able to be supported w/o water, or even if another planet did have water. it doesnt mean there life system is the same (atoms-molecules-cell-organ-organism) and it also doesnt mean evolution worked in the same way or even exist there. or IF they exist they could even be so different that we dont understand its a life form at all
//o and the bubble as the universe theory there has to be something outside the bubble...
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First of all, the Earth hasn't always been so hospitable to life. We suspect that when life first evolved on earth, the atmosphere was must too hostile to support life. The earth most likely didn't even start off with water on its surface. Scientists theorize that the water that is now on earth came from 1 or many meteors that hit the earth during its early development. The atmosphere was most CO2, the temperature was probably much too hot for life to survive, and the pressure was many times higher than it is today. Life most likely began at the ocean floor, living off of the undersea vents. The earth didn't become habitable to life as we know it until primordial life transformed the atmosphere into the oxygen rich atmosphere we see today. It seems that life can actually survive in much harsher conditions than we live today.
Theres a possibility that on water rich titan, one of Saturns moons, supports some form of life. The moon is completely covered in Ice, which is miles thick (I'm not exactly sure how thick it is, its deep though). Because of the properties of water (it expands when it freezes) the immense pressures at the bottom of all that ice would cause it to melt and become a liquid. In this layer of liquid water organisms could survive off of the undersea geothermal vents much like they do on earth.
Because the universe is so big, the possibility that no other life exists goes to zero (if you've taken calc, you're essentially dividing by infinity)
//It you would like to know whats outside our perceived universe google or youtube "flatland" it should help to explain what is beyond what we can see (or perceive/understand).