What about this: A piece of shrapnel, found at the Roswell crash site, that doesn't have the isotopic composition that earthly metals has:
" Kimbler says the isotope work is so important because the ratios are “very much like our fingerprints.” Certain concentrations of elements on earth are unique to Earth. So if you know isotopic ratios for magnesium, it will be the same for anything on earth with magnesium, but if it is not from Earth, it will have a different ratio. For instance meteorites have different ratios because they are not from Earth. Isotopic analysis is necessary to determine if a material is from Earth or another world." http://www.openminds.tv/test-confirms-roswell-debris-733/
Now I don't know if that is truly a way to separate earthly from non earthly origin. Perhaps one here can tell? Now combine it with this:
"Another important aspect of the material being aluminum and showing unearthly origins is that aluminum must be manufactured. Unlike some natural elements, such as gold or silver that can be found as nuggets in its raw form, aluminum is not found in nature. If this proves to be material not of this earth, it means this was something that was manufactured elsewhere. Thus far humans are not manufacturing anything in space, let alone something that would fall out of space and land outside of Roswell in a location where an alleged spacecraft was found in 1947." (same source)
Isotopic analysis is necessary to determine if a material is from Earth or another world." http://www.openminds.tv/test-confirms-roswell-debris-733/
...really? Here is the data they found.
Isotope | Measured | Background
--------+----------+------------
Mg-24: | 79.1±0.5 | 78.6
Mg-25: | 10.1±0.5 | 10.1
Mg-26: | 10.8±0.5 | 11.3
You will note that the natural background concentrations fall within the error bars of the measurements. Meaning no significant difference.
When you plot it on a graph with no error bars, it looks like th...
Recently I've been struck with a belief in Aliens being present on this Earth. It happened after I watched this documenary (and subsequently several others). My feeling of belief is not particular interesting in itself - I could be lunatic or otherwise psychological dysfunctional. What I'm interested in knowing is to what extend other people, who consider themselves rationalists, feel belief in the existence of aliens on this earth, after watching this documentary. Is anyone willing to try and watch it and then report back?
Another question arising in this matter is how to treat evidence of extraordinary things. Should one require 'extraordinary evidence for extraordinary claims'? I somehow feel that this notion is misguided - it discriminates evidence prior to observation. That is not the right time to start discriminating. At most we should ascribe a prior probability of zero and then do some Bayesian updating to get a posterior. Hmm, if no one has seen a black swan and some bayesian thinking person then sees a black swan a) in the distance or b) up front, what will his a posterior probability of the existence of black swans then be?