11 jan 1930 ano - 1921 : Robots; insulin 1922 : Aga cooker 1923 :Hearing aids 1924 : Frozen food 1925 : Geiger counter; television 1926 : Liquid fuel rocket; pop-up toaster; aerosol sprays 1927 : ‘Talkies’ at the movies, 1928 : Iron lung; penicillin 1929 : Artificial life 1930 : Jet engine; mechanical toothbrushes; Scotch tape

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New timeline

ByLauryn S

24 set 2018

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