There aren't any HERE, perhaps.
It is a big Universe out there. Until you have at least sampled a few thousand planets, you have absolutely no basis for a negative conclusion. We have sampled only a very few.
Space/Science » in reply to There aren't any
It is a big Universe out there. Until you have at least sampled a few thousand planets, you have absolutely no basis for a negative conclusion. We have sampled only a very few.