1.5 years ago I wrote an astrological post about oral sex as the reason for throat cancer. Last week, a friend sent me a link to a press-release on the same topic. Maura Gillison of the Ohio State University has collected statistics and reviewed bibliography that traces similar medical studies back to 1998.
Several groups independently came to the same conclusion. Some spent years in the lab studying biological samples, others collected and analysed behavioural statistics. Knowledge may be acquired by so many various means.