11.   Epstein has shown that overactivity of Sonic hedgehog is the cause of basal cell carcinoma, a common though treatable human skin cancer.

12.   Eyeguard scans the contents of the video memory, in search of image pixels that appear to be human skin.

13.   For centuries, scientists have debated the cause of differences in human skin color.

14.   Further, the company says the suit has less water resistance than human skin.

15.   Handling photos can damage them because the human skin contains oils that are detrimental to the emulsion and support of a picture.

16.   He plans to examine this hypothesis with similar mice with transplanted human skin.

17.   He said police now have devices that read the radiation emitted from all materials, including human skin.

18.   Human skin cells, known as fibroblasts, have been provided by an anonymous donor.

19.   Human skin collected from cadavers -- and kept in frozen storage -- most resembles flesh-colored nylons.

20.   In laboratory studies, melanosomes from human skin can inhibit micro oganisms.