The dinosaur at the museum 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. Amazed by his answer, he says: - Wow!, 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.