"The future of humanity depends on our ability to be able to make space travel possible."

"The ultimate goal of science is to provide a single theory that describes the whole universe."

"The human race is just a chemical scum on a moderate-sized planet, orbiting a very average star in the outer suburb of one among a hundred billion galaxies. We are so insignificant that I can't believ…"

"Cosmology is the study of the large scale structure of the universe, and how it has evolved over time."

"I'm a physicist, and I believe in science. I don't believe in miracles."