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When Do Fish Sleep? : An Imponderables Book (repost)

Posted By: Veslefrikk
When Do Fish Sleep? : An Imponderables Book (repost)

When Do Fish Sleep? : An Imponderables Book
Collins | 2005-03-01 | ISBN: 0060740930 | 320 pages | PDF | 2,2 MB

Ponder, if you will …
Why are tennis balls fuzzy?
How come birds don't tip over when they sleep on telephone wires?
What makes yawning contagious?