"Even the stars can be measured,"

"It's like going out and saying, "That tree is a car." Well, the tree's not a car. A tree's a tree. Marriage…"

"It was a feature peculiar to the colonial wars of North America, that the toils and dangers of the wilderne…"

"Leibnitz, the great mathematician, published his 'Protogaea' in 1680. He imagined this planet to have been …"

"Searching for the window into nature's soul" - Smithsonian magazine"

"Only think that I am now writing in a room full of Claudes... almost of the summit of my earthly ambitions."

"Woe unto thee if after all thy profession thou shouldst be found under the power of ignorance, lost in form…"