Stone Age women aren't known for their beauty, and yet what red-blooded Homo Sapien wouldn't propagate the species all night long with any of these five evolutionary exceptions? They didn't need push-up bras or fancy dresses to achieve perfection either, just a steady diet of dinosaur shanks and the occasional mud bath. So give credit where credit is due -- if it weren't for these ladies, you may not be alive today.

EVOLET / Camilla Belle

10,000 B.C.

Greatest contribution to the gene pool: Eyebrows even a wooly mammoth would envy.

Stone Age beauty secret: Extrusive igneous rock makes a great exfoliant.

Hair-care regimen: Combs once a year with a stick.

LOANA / Raquel Welch

One Million Years B.C.

Greatest contribution to the gene pool: Prototypical hourglass figure, one million years before hourglasses actually invented!

Stone Age beauty secret: Ratty squirrel-pelt bikinis are surprisingly slimming.

Hair-care regimen: First woman in history to have her own stylist?

LANA / Barbara Bach

Caveman

Greatest contribution to the gene pool: Cheekbones sharper than any paleolithic axe.

Stone Age beauty secret: Only accessorize with mammal bones! Reptile bones are so last millenium!

Hair-care regimen: Damp cave air naturally repairs split ends.

IKA / Rae Dawn Chong

Quest for Fire

Greatest contribution to the gene pool: Taut lissome haunches plus no interest whatsoever in modern fads like clothing.

Stone Age beauty secret: Extreme goth make-up.

Hair-care regimen: Why go to the salon when you can just soak your locks in Cro-Magnon muck?

AYLA / Daryl Hannah

Clan of the Cave Bear

Greatest contribution to the gene pool: Strapping Teutonic pulchritude.

Stone Age beauty secret: Ugly friends make you look even hotter!

Hair-care regimen: Impossible to get hair that lustrous without a little stearamidopropyl dimethylamine -- apparently Pantene Pro-V Daily Moisture Renewal invented much earlier than paleontologists have estimated.