Which came first? · Tricky

Which came first: Blood groups or the Harlem Globetrotters?

Blood groups came first, in 1901 (discovered). The Harlem Globetrotters followed 25 years later, in 1926 (founded).

Older Than You ThinkOlder Than You ThinkWhich came first? Sixteen pairs, from obvious to "wait, really?"Quiz11 seconds a pairMobile & desktop
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  1. First1901

    Blood groups

    discovery · discovered

    Karl Landsteiner discovered the main human blood groups in 1901.

    Checked against Wikipedia and Wikidata

  2. Second1926

    The Harlem Globetrotters

    club · founded

    The Harlem Globetrotters were founded in Chicago in 1926.

    Checked against Wikipedia and Wikidata

All which-came-first pairs · About Older Than You Think · Quiz games

Years from Wikidata, each checked against the item’s English Wikipedia article on 2026-10-18. A year stands for what its label says: a founding, a first patent, a premiere.