| The world's largest switchboard is in the Pentagon, Washington DC, Centre of American defence. About 25,000 telephone lines can be used at the same time. :: The human body has enough fat to produce seven bars of soap. :: Despite weighing up to 3,170kg, hippos can run as fast as humans on land. :: We are born with 300 bones, but by adulthood we have only 206 in our bodies. :: Frogs are found on all continents except Antarctica. :: |