7 ms·
Pigeons do this too, believe it or not. http://science.sciencemag.org/content/212/4495/695 http://science.sciencemag.org/content/212/4495/695
by fenwick67 9y ago
Pigeons do this too, believe it or not.
http://science.sciencemag.org/content/212/4495/695 http://science.sciencemag.org/content/212/4495/695