Guest Writer
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Magazine
In the July 6 SN: Celebrating the 50th anniversary of Apollo 11, stone tool dates face scrutiny, ocean plastic goes deep, records of Inca taxation, erosion spurred plate tectonics and more.
Amanda B. Keener's Articles
- Rethink
An eye disorder may have given Leonardo da Vinci an artistic edge
An analysis of portraits believed to portray Leonardo da Vinci offers evidence that the artist had exotropia, in which one eye turns outward.