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Asked by jackburton to Alison, Artem, Caroline, John, Gunther on 19 Jun 2012.
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Artem Evdokimov answered on 19 Jun 2012:
Not that we know for sure. However some of the more esoteric Quantum Theory offshoots speculate that there are multiple parallel worlds and that means the almost-certain existence of other planets with human life. In general, it is just too hard to say – but it would be nice to find out some day!
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John Short answered on 20 Jun 2012:
We are unique to this planet because of planetary specific environment, animal, bacterial and viruses that are present and how things evolved.. However, if another species did evolve from an ape like ancestor like we did, they may look like us (or not) but would still have differences in their DNA, physiology at the molecular level etc. Even if we could reproduce together, we would still not be of the same species and call them human.
Comments
nisma commented on :
not, humans something else. But i don’t understand why people call them aliens