Click on 
at the bottom of each page to move through the story.
Click on 
to move back a page.
By Tom Hawkins, NIEHS Office of Communications
Click on at the bottom of each page to move through the story.
Click on to move back a page.
By Tom Hawkins, NIEHS Office of Communications
NIEHS Kids' Pages are supported by the NIEHS Office of Communications and Public Liaison.
111 T.W. Alexander Drive, Research Triangle Park, NC 27709
