Blind as a bat

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Dreamweaver
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Blind as a bat

Post by Dreamweaver » 09 Sep 2017, 16:31

Bats have an echolocation system, and don't bump into things. Unless they are smooth, vertical structures such as steel and glass buildings. Those appear invisible to them!

http://www.nature.com/news/bats-slam-in ... _PORTFOLIO
I dream, therefore I am.

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