How Our Understanding of Gender Has Changed Over Time
![](https://media.wnyc.org/i/800/0/l/85/1/bathroombills.jpg)
Unisex signs hang outside bathrooms at Toast Paninoteca on May 10, 2016 in Durham, North Carolina. Debate over transgender bathroom access spreads nationwide.
( Sara D. Davis/Getty Images )
( Sara D. Davis/Getty Images )
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