Some crickets chirps can be used to estimate the temperature. The Earth's temperature rises slightly during a full moon. Bees have 5 eyes A Rubik's cube can make 43,252,003,274,489,856,000 different combonations. Winter lasts for 21 years on Uranus. A caterpillar has more muscles that a human. Only female mosquitoes bite. Sperm Whales have the heaviest brains on the planet. Some of the first shoes were made by pouring rubber into a waffle iron. The human body contains enough iron to make a two inch nail. A shark can grow and lose up to 30,000 teath in its lifetime. An Eagles nest can weigh more than a refrigerator. Traffic lights were invented before cars. Kids in the United States use about 730 crayons by their tenth birthdays. A lock of Elvis Presley's hair sold for $115,120. Mountain Lions can whistle. South Africa's giant bullfrog sometimes attaks lions. It would take 788,832,000 two-inch yellow sticky notes to encircle the globe. No dogs are allowed in Antarctica. Most Americans eat about 1,500 peanut butter and jelly sandwiches before graduating from high school. Some worms can grow up to 100 feet long. Most squids have 3 hearts. A lightbulb in Texas has been continuously burning for 96 years. Jupiter weighs twice as much as all the othe planets in the solar system combined. Some frogs survive the winter by freezing almost solid.