Mona Lisa model was male, researchers say
ABC February 3, 2011, 8:26 am

http://au.news.yahoo.com/odd/a/-/odd/8766618/mona-lisa-model-was-male-researchers-say/

Italian researchers who specialise in resolving art mysteries believe they have discovered the disputed identity of the model for Leonardo da Vinci's Mona Lisa - and claim he was a man.

[...]

Salai, real name Gian Giacomo Caprotti, an effeminate young artist who worked with da Vinci for 25 years, is thought to have served as a model and muse for several of his paintings.

This is kind of old news.  It has be agued for years that the Mona Lisa was really Leonardo himself.