I have been watching the program on TV for some evenings now and find it very interesting.
http://www.history.com/shows/ufo-hunters
From the view of the sceptics the results are always inconclusive, but I consider some of the evidence very convincing.
For instance the small metal object in a man’s leg that emitted radio frequencies until it was taken out of the leg.
It seems to me that the construction and implantation of such a device does not exist in our medical know how.
Sure, there are micro chip implants, but they are passive devices that do not transmit radio frequencies until excited by an external source.
It is too bad that they did not try to find out if the frequencies were modulated somehow, before taking it out of the man’s leg.

On another note, I finally had the chance to re-read a book that I found very interesting when I first read it back in the late 1950’s.
http://www.thenewearth.org/InsideTheSpaceShips.html
Sure there is a lot in that book that seems like fiction, but there are also many things that make perfect sense.

One web site that I can recommend to anyone that wants to know anything is the following:
http://www.wolframalpha.com/