Dogs and Humans

Scientists often choose to run cognitive and behavioral tests on animals before or instead of testing human subjects due to legal and ethical restrictions on the whole experimenting on humans thing. Although primates are often used because of their genetic proximity to humans, some researchers in Budapest are favoring canines instead for some interesting reasons.
Primarily, canines participate in human social interactions more readily than other animals. Many think that modern dogs are a good demonstration of co-evolution, however, at least one scientist does not believe they have evolved past the gray wolf, since they are still the same species and can interbreed. However, wolves do not know how to make a guilty face like this one used to elicit a human response, not a canine one. The article in its entirety can be found here.