Countless women are alive today because of ideas stimulated by a design flaw in the Hubble Space Telescope.

If you get asteroids about a kilometer in size, those are large enough and carry enough energy into our system to disrupt transportation, communication, the food chains, and that can be a really bad day on Earth.

Scientific literacy is an intellectual vaccine against the claims of charlatans who would exploit ignorance.

Einstein's theory, we know that it fails. In advance, we know it fails. So that a deeper understanding of nature is awaiting us.

One of the things that fascinates me most is when people are so charmed by the universe that it becomes part of their artistic output.

FM signals and those of broadcast television...travel out to space at the speed of light. Any eavesdropping alien civilization will know all about our TV programs (probably a bad thing), will hear all our FM music (probably a good thing), and know nothing of the politics of AM talk-show hosts (probably a safe thing).

If you're a scientist, and you have to have an answer, even in the absence of data, you're not going to be a good scientist.