A man sits at a kitchen table at night before a cooling apple pie whose steam rises into a window full of stars and galaxies.

Original artwork, not a still

Cosmos  ·  1980

Carl Sagan

If you wish to make an apple pie from scratch, you must first invent the universe.

Behind the line

What it means

Our interpretation.

It reads as a joke and is a lesson: to explain a pie fully you need nucleosynthesis, and every ingredient is a chain of causes running back to the Big Bang. Fans quote it for the scientific humility and the Sagan voice, and it turned up on posters, T-shirts and a long run of internet memes. Whether it comes from the book or the broadcast, the idea is the series in miniature.

Context reviewed

In context

Spoilers for CosmosShow the scene

Sagan uses the line to show that nothing in the universe stands alone. In the Cosmos television series, it comes in episode 9, 'The Lives of the Stars', first aired by PBS on 23 November 1980: the simple job of making an apple pie is traced back through its ingredients to the atoms in them, and on to the stars where those elements were formed. The book of the same name, published the same year, carries the line too, on page 218 in the Wikiquote reference.

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