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Jan 2, 2018 at 21:48 comment added Shufflepants This seems to be asking questions which we haven't been given enough information to answer. "What techniques are available for use to see invisible aliens?" Nothing can really be said about this unless know how they are invisible.
Feb 28, 2017 at 9:41 vote accept Karan Desai
Dec 18, 2016 at 6:29 comment added Jorge Aldo I would be afraid if they are into the grope fetish...
Dec 18, 2016 at 6:18 answer added rangerike1363 timeline score: 0
Dec 18, 2016 at 2:07 answer added Arsevere timeline score: 0
Dec 17, 2016 at 22:38 answer added Dragrath timeline score: 2
Dec 17, 2016 at 18:07 answer added Jacob timeline score: 2
Dec 17, 2016 at 13:10 comment added Karan Desai @kingledion You may consider radar as ultrasonic radar.
Dec 17, 2016 at 13:09 history edited Karan Desai CC BY-SA 3.0
[Edit removed during grace period]
Dec 17, 2016 at 13:03 comment added Karan Desai I have edited the question to clarify the context @Zxyrra, Ayutac and AlexP
Dec 17, 2016 at 13:02 comment added Karan Desai I have edited the question to clarify the context. @rangerike1363
Dec 17, 2016 at 13:00 history edited Karan Desai CC BY-SA 3.0
Clarified the question
Dec 16, 2016 at 16:36 comment added Joe Bloggs 1: The lasers might tip them off...
Dec 16, 2016 at 16:29 comment added AlexP Are they also completely transparent so that they don't appear as deep black shapes?
Dec 16, 2016 at 16:17 comment added Ayutac Visible by temperature cams? Also, the aliens from The Silence in Dr Who spoiler-alert are genetically engineered in such a way that anyone who looks at them forgets them the moment they look away again. They were there since the invention of the wheel. Earth belongs to them. There is no need for weapons for them. Just a thought ;)
Dec 16, 2016 at 16:07 answer added Werrf timeline score: 8
Dec 16, 2016 at 14:32 answer added Cort Ammon timeline score: 4
Dec 16, 2016 at 14:31 comment added kingledion How we did find an unnatural distubance using radar (in the high Mhz to Ghz frequency range) but then can't find anything using our radio telescopes and satellites, many of which can detect signals in the same ranges?
Dec 16, 2016 at 14:28 comment added rangerike1363 Does this include being invisible in the IR or Gamma as well since we have satellites that can check for those too?
Dec 16, 2016 at 14:12 history asked Karan Desai CC BY-SA 3.0