Quote:
Originally Posted by sraL
So life elsewhere isn't a mathematical probability?
1. As soon as the earth was suitable for life, life appeared. Though not proof, it does kinda hint that life isn't that hard once the conditions are right.
2. Large numbers of the different parts of life have been shown to spontaneously form from filling a flask with the chemicals that were on the earth when it formed, and zapping them with sparks ( lightning )
3. The Universe is big. REALLY big. I'm not sure you're getting how big it is. There are more stars in the universe than there are grains of sand on all the beaches on the entire earth. So even if life is very unlikely to start, which evidence doesn't really show it is, you still have 5,000,000,000,000,000,000,000 rolls of the dice to get life. And that's just now! The universe has been rolling those dice for around for 13,700,000,000 years, and will keep rolling them for many more billions of years to come.
All that strongly suggests life elsewhere is probable.
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I'm not knowledgeable about biology, chemistry, or physics, so I don't have much comment to make on this.
One thing, though: you mention the size of the universe. That's just the observable universe... I'm fairly sure that we don't know how large the whole thing is.