A guy is visiting a museum and he sees a dinosaur’s skeleton. Curious about it, he asks the guard next to it, “Excuse me, sir. How old is this dinosaur?”
“It is 65 million years, 4 months and 13 days old.” he said.
“Wow!” he said amazed, “How can you be so precise about it?”
“Well, when I first started working here, they told me it was 65 million years old… and that was 4 months and 13 days ago.”