When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images Baring teeth, growling and lunging are all signs of aggression in dogs. The ...

Long-term close relationships require a lot of work to maintain, and even the best of them may fall short at times from the ideals that we all hold about what constitutes a good relationship.

A sample of 4,013 participants from 24 countries were asked about aggression toward siblings and non-sibs, to determine ...