But investment in space stimulates society, it stimulates it economically, it stimulates it intellectually, and it gives us all passion.

There is no debate in the scientific community...We need [Congress] to change things, not to deny what's happening.

By the way, most of the light that comes from the sun is green.

We need them. We need scientifically literate voters and taxpayers for the future.

Unlike science, creationism cannot predict anything, and it cannot provide satisfactory answers about the past.

In another couple centuries I'm sure that worldview won't even exist. There's no evidence for it.

History is but the record of the public and official acts of human beings. It is our object, therefore, to humanize our history and deal with people past and present; people who ate and possibly drank; people who were born, flourished and died; not grave tragedians, posing perpetually for their photographs.