Santa Claus Can't Live at the North Pole

Here's a riddle for the kids. A man leaves his house for a walk. He walks a mile due south, a mile due east, and a mile due north, and finds he is back where he started. What is the man's name? Yes, Virginia, his name is Santa Claus. And his house is at the North Pole. But don't go looking for him there, Virginia. Here's the cold fact: Santa Claus doesn't live at the North Pole. I knew from a young age that there was something fishy about Santa's address. At the age of five or six I discov...

 Carl Sagan's Encounter With a Dolphin's Theory of Mind

I was swimming in a large indoor pool with Peter. When I threw the pool's rubber ball to Peter (as was natural for me to have done), he dove under the ball as it hit the water and batted it with his snout accurately into my hands. After a few throws and precision returns, Peter's returns became increasingly inaccurate – forcing me to swim first to one side of the pool and then to the other in order to retrieve the ball. Eventually, it became clear that Peter chose not to place the ball with...