The Virtual Museum has been discontinued since the content was not as current as we would like.
HHMI offers many resources for science educators, students, and the science-curious. Check out what's available free from HHMI:
HHMI is a recognized leader in biomedical research. Discoveries made in HHMI labs are advancing our understanding of the natural world as well as some of society’s most vexing health problems, including AIDS, cardiovascular disease, cancer, and diabetes.