Science is merely an extremely powerful method of winnowing what's true from what feels good.

Atoms are mainly empty space. Matter is composed chiefly of nothing.

I maintain there is much more wonder in science than in pseudoscience. And in addition, to whatever measure this term has any meaning, science has the additional virtue, and it is not an inconsiderable one, of being true.

Eratosthenes's only tools were sticks, eyes, feet, and brains; plus a zest for experiment. With those tools he correctly deduced the circumference of the Earth, to high precision, with an error of only a few percent. That's pretty good figuring for 2200 years ago.

We began as wanderers, and we are wanderers still.

There is a lurking fear that some things are not “meant" to be known, that some inquiries are too dangerous for human beings to make.

We live on a mote of dust suspended in a sunbeam