The "batteries" were found in Bagdad (do a google on "bagdad battery" and you'll get a ton of hits, especially if you spell it correctly which I don't).

The vast, vast, vast majority of scientists do not work for the governement or other "superiors" who can silence them. Scientists in academia generally enjoy (at least for now) the freedom to publish findings without fear of recrimination. I would LOVE to see reliable physical evidence. Anecdotal sightings are not physical evidence, nor are radar blips. How about a fiber that matches nothing known on earth. How about an artifact of any kind. Until there is anything of this sort, I am still eagerly waiting.