.. As I recall, it was about 2 days ago, that "grevillea" asserted: 'You should Only believe what you can see'{!?} -- D-u-h?!.. what about Not being able to see the air we breathe?; provided of course, that you Don't live in Beijing, China.. amongst a number of other, least desirable locales!

getting, "Sorry, this video no longer available"
 
But, I do recall the other day reading up on that subject - being invisible. Yes, it is possible. there is some breakthrough on bending light around an object. So I guess the Gene Rodenburry (Star Trek cloaking device) was right after all!
 
same with "beam me up, Scotty". Scientists have been able to move matter pretty much in a beam and then reassemble it. the last I checked, they moved the matter a much larger span and with more matter than ever before.
 
Truth is stranger than fiction!