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Galileo’s 1638 Essays Argue Giants Can’t Exist

8/17/2026

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Story summary
  • Galileo Galilei argued in his 1638 “Dialogues Concerning Two New Sciences” that giants cannot exist because their mass would exceed bone strength.
  • He noted that surface tension sufficient for water bugs would be far too weak to support a giant’s weight.
  • He warned that a Lilliputian-size human would be overwhelmed by electrostatic forces and viscous water, making ordinary movement impossible.