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Old 03-23-2016, 10:18 PM
Senegoid Senegoid is offline
Join Date: Sep 2011
Location: Sunny California
Posts: 14,839
I've heard it speculated that squirrels are really really good at 3-D spatial understanding, which probably includes the effects of gravity.

Birds probably have a good understanding of gravity, which might be very different from our understanding. Fish probably don't know much about gravity.