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Galileo Galilei - Wikipedia
Galileo | Biography, Discoveries, Inventions, & Facts | Britannica
Galileo Galilei - HISTORY
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Galileo Galilei - World History Encyclopedia
Galileo Galilei - Stanford Encyclopedia of Philosophy
Galileo (Galilei) summary | Britannica
Galileo Galilei - Stanford Encyclopedia of Philosophy
BBC - History - Galileo Galilei