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How do ants protect plants?

Most plants have developed some way of avoiding being eaten. You only have to think of stinging nettles, roses or brambles to be painfully reminded that any creatures interfering with them can be stung or scratched quite severely. Many species of plants produce natural insecticides which keep unwanted insects at bay, but some tropical palms and acacias have enlisted the …

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How do Animals Communicate?

Humans have invented new and advanced ways of communicating with each other. Television, radio, telephones and of course email. You will be surprised to know that animals who seem to have very simple methods of communication – using their bodies and voices – are also capable of long distance communication. Foot stomping and low frequency rumbling created by elephants can …

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How did the words ‘ok’ and ‘viz’ originate?

While no one’s sure of the origin of ‘ok’, there are a handful of popular explanations. One view is that it derives from the Scot expression ‘och aye’, the Greek ‘ola kala’ (it is good), Choctaw Indian ‘oke’ or ‘okeh’ (it is so), French ‘aux Cayes’ (from Cayes, a port in Haiti with a reputation for good rum) or ‘au …

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How did the symbols +, – etc originate?

The earliest print appearance of the modern signs seem to come from a book on Mercantile Arithmetic by Johannes Widmann in 1489, used to indicate surpluses and deficits. The + is a simplification of the Latin “et” (comparable to the ampersand – &). Widmann referred to the symbols – and + as minus and mer. According to the ‘Earliest Uses …

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How did the Sturt Desert get its name?

The first explorer to venture deep into the barren heart of Australia was an Englishman, Charles Sturt. He was an army captain when, in 1826, he was sent to new South Wales with a shipload of convicts. He became military secretary to the governor, but his real interest lay in leading expeditions into the interior, during which he discovered and …

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How did the polar bear evolved?

Zoologists believe that the polar bear evolved from a species of brown bears in Siberia, making polar bears the eighth species of bears. With the shifting of polar ice caps and glaciers, the brown bear species native to that area was forced to adapt to the new environment, undergoing physical body changes to keep warm in the brutally cold weather. …

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