An expert on whales was telling friends about some of the unusual findings he had made. "For instance," he said, "some whales can communicate at a distance of 300 miles."

"What on earth would one whale say to another 300 miles away?" asked a sarcastic member of the group.

"I'm not absolutely sure," answered the expert, "but it sounds something like 'Heeeeeeey! Can you hear me nowwww!?!