The ratio of occurrence of hydrogen-ammonia planets and these super-dense water-oxygen worlds of theirs over the entire Galaxy--and remember that they have actually conducted a survey of significant sample volumes of the Galaxy which we, without interstellar travel, cannot do--is about 3 to 1.
They have used a large sample of volumes.
There is no such thing as interstellar travel.
A group of men travel over an ocean.
They were not safe and customers demanded refunds.
USPS proposed revising service to standard mail
A classroom of children are playing during recess.
The man is old.
They shouldn't offset the income.