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Originally posted by thepostman
Assuming life originates from water it makes sense we are all symetrical making moving through water easier and more effecient. If you need to walk on land you need legs, if u need to fly you then need wings, nature has given insects,amphibians,reptiles, birds & mammals these and all groups have come up with similar designs. I disagree with the number of scientists who argue alien life would not resemble life as we know it. It's common sense generally it would.
Originally posted by Hal9000
To add to your idea of nature coming to the same solution by different means. I think that when we do venture out and find other life, we will find that there are certain rules of nature that will apply on all planets. For example, it would not surprise me that aliens would have similar humanoid forms like us, because of some rule in nature that says this is the form that fosters intelligence the most. Not that it is the only one, but I would bet it is true.