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Touch But Can't See

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#4408
Fun:*** (2.45)
Difficulty:** (1.92)
Category:Science
Submitted By:LungTungBeng****
Corrected By:Palsha

 

 

 



What is solid and not translucent which you can touch with your finger but you can't see it in broad daylight, even through a mirror?





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