"What an astonishing thing a book is. It's a flat object made of trees, with flexible parts on which are imprinted many dark squiggles. But it is still a world of strong emotion, of thought, of revelat…"

"The beauty of a living thing is not the atoms that go into it, but the way those atoms are put together."

"The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth."

"The nitrogen in our DNA, the calcium in our teeth, the iron in our blood, the carbon in our apple pie were made in the interiors of collapsing stars. We are made of starstuff."

"The universe is full of mysteries waiting to be solved."