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.