Albert Einstein - The theory of relativity was developed by, Neil Armstrong - The fi rst step on the Moon was taken by, 1839 - The fi rst bicycle was built in, Marie Curie - The radioactive elements radium and polonium were discovered by, 1926 - Television was invented in, James Watt - The steam engine was constructed by, the Romans - Hot baths and central heating were first used by, Robert Goddard in 1926 - The first rocket was launched by,

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