Jim Peebles

We often say that our science is objective and accurate, but we don't often say that our science is incomplete - that although the established parts of natural science are very well tested and the evidence makes a compelling case for things being as they've been described, there nevertheless are open questions that we cannot answer.

There must be enormous numbers of planets around the stars in the many galaxies in our observable universe. We may be sure that wonderful things are happening on these planets that the human race never will observe.