A tourist was visiting New Mexico and was amazed at the dinosaur bones lying about.
“How old are these bones?” the tourist asked an elderly Native American, who served as a guide.
“Exactly one hundred million and three years old.”
“How can you be so sure?” inquired the tourist.
“Well,” replied the guide, “a geologist came by here and told me these bones were one hundred million years old, and that was exactly three years ago.”