Another mystery of the universe solved...

Reader Ben comes through on the great Mona Lisa Eyebrow Mystery. From Wikipedia:

Mona Lisa (also Monna Lisa; Italian, La Gioconda, French, La Joconde), by Leonardo da Vinci, is perhaps the most famous painting in the world, going so far as to be iconic of painting, art, and even visual images in general. No other work of art is so romanticized, celebrated, or reproduced.

The work, which was accomplished between 1503 and 1506, measures 77 x 53 cm and is an oil painting on wood. It was brought to France by Leonardo when King Francois I invited the great painter to work at the Clos Lucé near the king's chateau in Amboise. As a result, the Mona Lisa today hangs in the Louvre in Paris, and is the museum's star attraction.

The identity of the lady in the painting is not known for certain, except that she was a wealthy Florentine. The most probable suspect is Madonna Lisa del Giocondo.

[snip...]

The painting has been restored numerous times: unfortunately, several details have been lost in the process, including Lisa's eyebrows and (possibly) a pearl necklace she was wearing

Now the only thing keeping me awake is trying to figure out what talent Arsenio Hall ever exibited that made him a celebrity.