Three people in a bar, talking about science:
“He said science was going to discover the basic secret of life some day,” the bartender put in. He scratched his head and frowned. “Didn’t I read in the paper the other day where they’d finally found out what it was?”
“I missed that,” I murmured.
“I saw that,” said Sandra. “About two days ago.”
“That’s right,” said the bartender.
“What is the secret of life?” I asked.
“I forget,” said Sandra.
“Protein,” the bartender declared. “They found out something about protein.”
“Yeah,” said Sandra, “that’s it.”
– from Cat’s Cradle (p. 25 in the 1970 Dell paperback.)
The Finch and Pea 