Mental Floss on MSN
How Do Dog Whistles Work?
Strolling along London's Zoological Gardens in 1876, Sir Francis Galton stopped in front of the lion enclosure, pulled out a ...
Dear reader, one of the skills I have always dreamed of nurturing is whistling. I am so envious of family and friends who can emit a sharp loud screech when they are trying to get attention. Sadly, my ...
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