If you took every nuclear weapon ever built at the height of the Cold War, lumped them together and blew them up at the same time, that would be one one-millionth of the energy released at that moment.

Just like people, stars can be important without being terribly bright.

Pseudoscience is like a virus. At low levels, it's no big deal, but when it reaches a certain threshold it becomes sickening.

Our solar system is fantastically bizarre. There are worlds with features we never imagined. Storms larger than planets, moons with under-surface oceans, lakes of methane, worldlets that swap places...and that's just at Saturn.

Sixty-five million years ago the dinosaurs had a bad day.

It’s dead obvious that creationism isn’t science, or even bad science. It’s nonsense. But I’ve long stated it’s also bad religion, because it doesn’t just take faith, it also takes a phenomenal disregard of reality.

Humanity and life are reflected in the stars, and the Universe itself is poetry.