Cosmos

Fri, 17 Jan 2025 00:00:00 +0000

Every atom in your body was forged inside a dying star. The carbon in your cells, the oxygen in your blood, the iron, the gold—every element heavier than hydrogen was cooked up by nuclear fusion in a stellar core and flung across space when that star died. As Carl Sagan liked to say, “If you wish to make an apple pie from scratch, you must first invent the universe.” This is not poetry dressed up as science; it’s the literal chain of custody of your atoms. And once you feel the weight of it, Sagan’s central point follows: on a speck this small, in a cosmos this vast, we are the only known place where the universe has woken up and begun to look at itself. That makes us worth protecting.

Carl Sagan on SummaryShelf

Cosmos