Which came first? · Counterintuitive
Which came first: Jupiter's moon Io or the Mayflower Compact?
Jupiter's moon Io came first, in 1610 (discovered). The Mayflower Compact followed 10 years later, in 1620 (signed).
- First1610
Jupiter's moon Io
moon · discoveredGalileo spotted Jupiter's moon Io in January 1610.
- Second1620
The Mayflower Compact
document · signedIn November 1620, 41 of the Mayflower's 101 passengers signed the Mayflower Compact aboard the anchored ship.
More pairs that fool people
- Which came first: Copernicus puts the Sun at the centre or the Mayflower Compact?
- Which came first: Jupiter's moon Io or the Stanley Cup?
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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.