- Ferrets sleep between 18 - 20 hours a day.
- An astronaut can be up to 2 inches taller returning from space (the cartilage disks in the spine expand in the absence of gravity).
- The grapefruit gets its name from the way it grows in clusters like grapes on a vine.
- Human thigh bones are stronger than concrete.
- All hurricanes form over the sea and can last up to 10 days.
- The pupils in goats' eyes are rectangular.
- Sound travels about 4 times faster in water than in air.
- Acrophobia is the fear of heights.
- Camels can drink 94 litres (25 gallons) of water in less than 3 minutes.
- Honey enters your blood stream within 20 minutes of being eaten.
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