Ross Exton of the Live Science Team shows us a magic trick, with a science lesson on how it really works. You can put completely transparent glass in completely transparent water, or completely transparent air, for that matter, and still see it. But some materials, like completely transparent glycerol, can change that effect in a totally weird way. -via Laughing Squid
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That said, I moved around almost constantly as a kid, and went to school in Missouri, so I've been exposed to so many dialects that I can use 'sunshower' and 'sneakers' on one hand, and then turn around and use 'y'all'.