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Ptolemy's original 2,000-year-old treatise in Greek was overwritten with an unrelated text in Latin. Using modern imaging, scientists were able to uncover a hidden manual.

Plus, Hubble turns 33, new research on the ISS, and how to gather resources to start a lunar colony.

The original writing was hidden in part by a 19th century attempt to read it.

The manuscript is believed to be a lost treatise by Ptolemy on his Meteoroscope. It was hidden within a copy of Etymologiae. Deciphering it has taken over 200 years.

After 200 years, a hidden Ptolemy text printed beneath a Latin copy has been deciphered.

Researchers have deciphered a long-lost text written by the ancient astronomer Claudius Ptolemy.

Scientists have decrypted a manuscript detailing Ptolemy’s Meteoroscope revealing just how it was made and used to find many astronomical facts.

After years of work, researchers have uncovered a guide to constructing an ancient tool for tracing distances and the stars.