Actually, the chances of radio contact are slim. If extraterrestrials do exist, they have probably been around far longer than us, so they have advanced beyond radio. Or, They found totally different mehods. I find the former to be more likely.
And, here's a thought from your's truly. This may be totally wrong (which, it probably is), but I don't care. Suppose that life did exist on another planet. Would it mean that it would definitely have to have water, oxygen, etc? Who says all life has to work the way Earth's life does? What if, an organism developed from Odd knows what, and evolved to match its surroundings?
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