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A Historian Was Reading a 500-Year-Old Book—and Found Galileo’s Handwritten Notes

Intricate detective work led a scholar to rediscover the traces of a genius.

4 Articles

Lean Right

An unexpected discovery in a historic library in Florence may shed new light on the intellectual formation of one of the central names in modern science. An Italian historian found a 16th century copy of the Almagest, a classic treatise on astronomy, filled with notes that experts believe were written by Galileo Galilei at the beginning of his career. Understand: In 1968, the Soviet Union sent two turtles to the Moon... and they came back alive …

·Brazil
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Lean Left

A researcher assigns notes in a 16th century astronomy book to Galileo. They show the Renaissance scholar as a pious follower of the geocentric world view

·Vienna, Austria
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A copy of the Almagesto, by Claudio Ptolemy, published in the Swiss city of Basel in 1551 – with numerous handwritten notes attributable to Galileo Galilei– was discovered by Ivan Malara, a researcher at the University of Milan, Italy, at the Central National Library of Florence. The finding is part of a study initiated more than three years ago, whose purpose was to determine which edition of the astronomical treaty composed in the second centu…

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Bias Distribution

  • 34% of the sources lean Left, 33% of the sources are Center, 33% of the sources lean Right
34% Left

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der Standard AT broke the news in Vienna, Austria on Monday, March 9, 2026.
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