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A LITTLE SOMETHING WORTH KNOWING

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HistoryOne small ahaInvention or discovery

These American brothers achieved controlled, sustained powered airplane flight at Kitty Hawk in 1903.

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HistoryOne small aha
Your new ahaWright brothers

Wright brothers has received the award Congressional Gold Medal. Source: Wikidata: Wright brothers ↗

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  1. 22This Russian chemist organized a periodic table that left gaps for undiscovered elements.RECALL
    Dmitri Mendeleev

    Predicted missing elements

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  2. 23He demonstrated protection against smallpox using cowpox material in 1796.RECALL
    Edward Jenner

    His 1796 experiment helped launch immunology

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  3. 24This French physicist discovered spontaneous radioactivity in uranium salts in 1896.RECALL
    Henri Becquerel

    Discovered in uranium salts

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