A random list of inventions

WHEEL – 3500 B.C , Mesopotamians

PAPER – 100 BC, China.

PRINTING PRESS – 1439 Johannes Gutenberg.

STEAM ENGINE – 1763 James Watt.

TELEPHONE – 1876 Alexander Graham Bell

SEMICONDUCTORS – 1833 Michaeel Faraday

AIRPLANE – 1903 Wright brothers.

PENICILLIN -1928, Alexander Fleming

BITCOIN – 2009 , Satoshi Nakamoto

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