Body >>> trunk An elephant's trunk is equivalent to the human nose and upper lip - yet an adult elephant can carry nearly 270 kilograms with it. It can also store about 4 litres of water in it. >>> giraffe A giraffe has the same number of bones in its neck as a human. They can also clean their ears with their half metre long tongue. >>> oysters Oysters can change from one gender to another and back again depending on which is best for mating. >>> camels Camels have three eyelids - these help protect their eyes from the sun and sand in the desert. >>> fish Fish are very good at tasting. They not only have taste buds in their mouths but some species also have them on their skin and sometimes on their fins. Catfish even have taste buds on their whiskers. >>> jellyfish Jellyfish are more than 95% water. They have no heart, bones, or brain, and have no real eyes. Yet the largest jellyfish, the Lion's Mane jellyfish, can reach 8 feet across with 200 feet long tentacles. >>> blood If all the blood vessels in the adult human body were laid end to end they would stretch 160,000 kilometres, that’s four times around the Earth. >>> orcawhale Orcas are voluntary breathers. They have to sleep with only half of their brain at one time. The other half remains awake to regulate their breathing. >>> goldfish The common goldfish is the only animal that can see both infra-red and ultra-violet light but their sight deteriorates quickly with age and UV vision is soon lost. >>> intestine The number of beneficial bacteria in the human intestine is equal to the number of cells in the human body. Planet >>> blackberries Batology is the taxonomic study of blackberries. Batologists classify and categorise the 1000 different species of blackberry. >>> earthworms Nearly one million earthworms can be found in a single acre of land. >>> chicken There are more chickens in the world than people. In the UK alone there are 30.6 million hens laying eggs - that’s half a hen for each member of the population. On top of this, 807 million chickens are consumed each year in the UK and at any one time there are 113 million of these strutting their stuff. >>> water Water is actually a blue colour when there is enough of it. Although water looks clear in a glass, from space the oceans are definitely blue. >>> gold There are 6 kilograms of gold per cubic kilometre of sea water. Animals >>> badgers It doesn't matter when badgers mate - the cubs are always born around February. This can happen because the female badger controls when the fertilised egg begins to develop. >>> pygmy shrew The smallest mammal in the world is probably the pygmy shrew. It weighs just two grams. To stay alive its heart has to beat over 1,200 times a minute and it must eat every few hours, day and night or it will starve to death. >>> cold fish Some Arctic and Antarctic fish have evolved proteins in their blood which act as antifreeze stopping their blood from freezing solid. >>> sperm whale The sperm whale is the largest predator that has ever lived. >>> octopus The blue ringed octopus, found in Southeast Asia, carries such a powerful neurotoxin that just one octopus contains enough to cause paralysis and death of ten adult humans. >>> blue whale The tongue of a blue whale is the size of an elephant. The entire whale generally weighs the same as about 30 elephants. >>> spider The pirate spider invades other spiders’ webs by creeping so slowly that the resident spider does not realise what is going on. The pirate spider can get close enough to bite, injecting a very toxic venom. >>> starfish Starfish have no brain – they’re just a bag of nerves. Back