Fire

Man had always known about fire, but causing it himself proved the means of his advancement. He needed it for cooking food, warding off dangerous animals and heating caves. But most importantly, fire allowed man to move out of hotter climes to colonize the globe.
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The Wheel

Some archaeologists claim the wheel was invented in about 50,000BC after the discovery of what looks like a wheel in Mesopotamia. Regardless of this possibility, it must be remembered that Stone Age man wandered over much terrain that would have been unsuitable for the wheel.
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Printing Press

No invention changed society more than the printing press. The secret of the printing press was the devising of block printing, where an exact copy could be made time after time.
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Railways

The natural consequence of steam power was locomotive force and the railway. The idea of using tracks to smoothly move wheeled carriages is remarkably old.
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Automobiles

The dream of producing a self-propelled vehicle which required no beast of burden goes back to at least the 13th century, when Roger Bacon mentioned the possibility and Leonardo da Vinci went on to
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Aeroplane

The principles of aerodynamics were first worked out by the grandfather of the airplane, the British inventor, Sir George Cayley. His studies of heavier-than-air flight led him to build a model glider
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Television

Television was not so much an invention as the placing of existing parts into a system. For instance, by 1910 most the components were in use, including the cathode ray tube and the amplifying triode. By
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Internet

In the 1960s Donald Davies in London and Paul Baran in Santa Monica independently invented packet-switching, converting data into packets which contained the address of sender and recipient. By
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