[Jade_Jet]

http://web.uconn.edu/mcbstaff/graf/Medical.html

Leeches actually are valid medical science. There just were not better alternatives at the time, and they sometimes can still be used today.

[mrec]

Blocked for me.

    web.uconn.edu uses an invalid security certificate. 

    The certificate is only valid for the following names: web2.uconn.edu, phonebook.uconn.edu, testsite.uconn.edu 

    Error code: SSL_ERROR_BAD_CERT_DOMAIN

[Jade_Jet]

You are right, edu sites... I changed the link to http.

[qbrass]

While leeches have an actual medical use, historical usage of leeches was cargo culting and not science.