Philip Abelson Quote
Often we are faced with a very large body of facts, and the problem is to know upon which facts to place a value. But it is not a matter of selecting which facts with regard to the existence of extraterrestrial life — the problem here is that there are virtually no facts. It is largely a speculative matter, and I speculate that there is no life.
In: Shirley Thomas, Men of Space; Profiles of the Scientists Who Probe for Life in Space, (Volume 6)