Two types of nanotechnology, metalenses and metamaterials, could soon make Harry Potter’s invisibility cloak a reality.
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Invisibility cloaks are not just possible, but are becoming reality (bigthink.com)
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19 Votes
I saw a football field sized blimp over 25 years ago that appeared to utilize a cloaking device of some kind. The blimp would switch from visible to invisible. I thought it was a ufo at first but then realized it was man-made.