An international team has found a mammoth in the Siberian tundra. The scientists bet which one of them can determine its age most precisely. The German scientist crawled into the cave and returned after 10 minutes: "It is 3.5 million years old." I can do better, said the American and crawled into the cave. He returned after an hour and said: "It is 3.47 million years old." At last the Russian scientist vanished in the cave. His colleagues waited for an hour, two hours, three hours, but it wasn't before the next day when he returned. "And? What do you think?" - "It is 3,468,324 years, 5 month and 2 days old!" - "Wow! How can you know?" - "The interrogation was tough, but in the end he confessed."