Blindfold

In January 2011, National Geographic published an article

http://phenomena.nationalgeographic.com/2011/01/03/forget-butterflies-wasps-and-flies-have-hidden-rainbows-in-their-wings/

There was everything the inexperienced reader needed. A lot of bright pictures, like this:

And a lot of loud words about the importance of the discovery, which was made by a simple student, who "taken off the blind" etc etc etc.

“wing interference patterns” are really unique for each species, and this fact allows ...

Now, what am I talking about?
This story reminded me of another long-forgotten story and pleasant memories knocked on the door of memory.

And i've catch this!

Close inspection of them when spread out and moving in the sun will show them to be peacock-hued.

The Lucian of Samosata, The Fly, an Appreciation

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...prototype may be founded in my blog https://golos.io/ru--mukhi/@labysel/doshlo-do-menya