I say to the grownups, if you want to deny evolution and live in your world, that's completely inconsistent with the world we observe, that's fine. But don't make your kids do it. Because we need them. We need scientifically literate voters and taxpayers for the future. We need engineers that can build stuff and solve problems.

People and stars are made of the same stuff.

My father was a very good Boy Scout. He was very skilled with knots, and he showed me how to tie a bow tie.

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.

Everyone, red state, blue state, everyone supports space exploration.

Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

SCIENCE is a part of EVERYONE'S everyday life.