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The earth similarity index for venus is 0.44, and for mars is 0.70

• drzaiusapelord 11y ago
  I understand, but that's a synthetic benchmark. We actually have no idea why Earth has life and other planets don't and similarity to Earth may not be a big factor (see theories on life in Europa's seas for example or non-carbon based life). I just feel everyone gets excited over nothing solely because its extra-solar. Our own solar system is fairly diverse. If life was common, we'd probably be seeing more of it here.
  • ericson578 11y ago
    maybe life is common enough, but doesn't typically overlap in time. Maybe life on mars or venus died out a billion years ago. We'll have a better picture when we study our solar system in more detail. Maybe 100 years? I agree that speculation this early in the game isn't enough to get excited over.