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Usually, we can't see any of this. Read more: The best microscope photos of the year reveal a strange and hidden universe in astonishing detail For the 45th year of the contest, four judges ...

(Spoiler alert: Costumes used to be legitimately terrifying). From trick-or-treating to carving jack-o' lanterns — here are 21 spooktacular photos that show how different Halloween looked a century ...

The main purpose of a sign is to communicate a message or convey information. Most are useful. But others are just plain ...