Alexander Graham Bell — what did Alexander Graham Bell do at each age?

アレクサンダー・グラハム・ベル | Scientist / Inventor | Born 1847

Timeline

• Age 23 (1870): Moved to Canada
• Age 29 (1876): Invented telephone
• Age 33 (1880): Founded Bell Telephone Company
• Age 40 (1888): Founded National Geographic

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