By Natasha Burton, Daily Makeover
jessica albaFor many women, our lashes are our favorite beauty accessories-just swipe on a little mascara, and we're suddenly ready to face the world.
But while you curl and primp your eyelashes daily, you probably don't know much about the little hairs themselves. Here are nine interesting-and even a little icky-facts about eyelashes you should know.
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1. They're a mammal thing.
Yes, the only animals that have eyelashes are mammals. In many species, lashes actually perform a similar function as cats' whiskers do.
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2. They're mostly protein.
Eyelashes are 97 percent keratin and three percent water.
3. They have a three-month lifecycle.
The lifespan of a lash is about 90 days.
4. The upper and lower lashes are different.
As you can likely see by looking at your own lashes, the ones on the upper lid are much