One quarter of all creatures are beetles -- Some jellyfish are immortal -- An octopus has three hearts -- Some fish can live on land -- Wood frogs freeze in winter -- Unborn sand tiger sharks are cannibals -- Snakes can't blink -- One birds beak is longer than its body -- A baby camel is born without a hump -- Plankton can't swim -- Chickens are dinosaurs! -- Giraffes sword fight with their necks -- Babies have more bones than grown-ups -- Butterflies taste with their feet -- Muscles cannot push, they can only pull -- Your digestive system can work upside down -- Cockroach brains can kill diseases -- Cactus spines are really leaves -- Tomato plants are carnivorous -- One quarter of our food depends on bees -- Glass can survive for a million years -- Glossary.