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Thomas Edison
invented incandescent light bulb
invented movie camera -
murie curie
discovered radium in 1898
discovered polonium in 1898 -
Guglielmo Marconi
developed, demonstrated and marketed the first successful long-distance wireless telegraph and in 1901 broadcast the first transatlantic radio signal -
Albert Einstein
provided a new way of calculating the size of molecules in 1905
Special Theory of Relativity in 1905
The case, "Why is the sky blue?" was settled by Einstein in 1911
invented a refrigerator in 1926 -
Jonas Salk
discovered and developed the first successful polio vaccine in 1947