And in subsequent interviews, he basically says that his evidence is pretty much hearsay

http://dsc.discovery.com/space/qa/alien-ufo-edgar-mitchell.html
http://cosmiclog.msnbc.msn.com/archive/2008/07/28/1227975.aspx

>http://www.reuters.com/news/video?videoId=87905&feedType=VideoRSS&feedName=TopNews&rpc=23&videoChannel=1&sp=true
>(veteran of the Apollo 14 mission)
>Edgar Mitchell, the sixth man to walk on the moon, says aliens have been visiting the earth for the past sixty years...