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4
votes
1answer
35 views

Do animals' facial expressions have similar meanings to humans'?

In the following pictures, the dog seems to be smiling to the camera. People staring at these picture also tend to feel comfortable and relaxed, presumably because they think it's very happy playing ...
3
votes
0answers
72 views

How long a dog can remember its owner's smell?

Can dog remember multiple smells? and how long it can remember a smell?
2
votes
0answers
71 views

How did the roar evolve from snort?

When Lions roar, or Dogs show aggression, they do that snort-roar thing. They're producing sound while inhaling. How did that come to be when all (?) other forms of sound involve exhaling? Humans do ...
0
votes
0answers
15 views

Why can dogs not have a pink(ish) coat color?

In yellow dogs, there is a mutation in the MC1R gene which leads to a nonfunctional receptor. This leads to the production of pheomelanin which is pink/red (depending on concentration) instead of ...
0
votes
0answers
13 views

Are there any pre-existing evolutionary explanations for the viscosity and abundance of canine mucus?

If there is, it's not something you find on search engines. To be honest, I first posed this question in a "Bad Ad-hoc Hypothesis" convention kind of context, but now I'm curious if there's any real ...