Both genes are necessary for the healthy development of the palate, teeth,skull and other facial structures.

VOA: special.2009.12.22

"Cow's Skull: Red, White and Blue" is a well known work by American artist Georgia O'Keefe.

VOA: special.2010.08.04

They raised the pirate flag -- with its picture of a skull and crossed bones.

VOA: special.2009.05.24

No feeling of a broken bone in the skull.

VOA: special.2009.10.28

His latest study is this skull bone of ceratosaurus , a large predatory dinosaur.

VOA: standard.2009.12.08