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

About Carl Sagan

Scientist • American

Carl Edward Sagan was an American astronomer, cosmologist, and astrophysicist who was a pioneer in the search for extraterrestrial intelligence. He is best known for his work in popularizing science, particularly...