"

 Semi-protected edit request on 22 February 2015 

Very tiny point; in the ""Early roles"" section:

They would have benefited from humans' upright gait that gives them larger range over which to see potential predators and prey, as well as color vision that, at least by day, gives humans better visual discrimination.[37] Camp dogs would also have benefitted from human tool use, as in bringing down larger prey and controlling fire for a range of purposes

It would be as well to spell the word the same way on each occasion.

86.136.150.74  
Fixed, thanks.   
I LOVE JOHN PIñON FOREVER <3  — Preceding unsigned comment added by 216.161.34.66   

 Dogs to replace sat nav... 

""Dogs prefer, when they are off the leash and Earth's magnetic field is calm, to urinate and defecate with their bodies aligned on a north-south axis.[196]"" Whoever added this failed to mention that such alignment occasionally causes the excrement to land on locked Wikipedia articles.  — Preceding unsigned comment added by 86.167.241.190   
Do you have a citation to counter the one given in the article?   
Observation provides the proof, no matter how unusual this may sound.  •  talk •   
I think it was me that added the source.  The IP should look at the magnetoception article; it is full of (surprising) examples.DrChrissy