|Dogs cry for joy after reuniting with their owners
There is a saying in English that says a dog is a man's (and woman's) best friend. Dogs and humans have shared close and loving relationships for thousands of years. Scientists believe the bond between humans and dogs is deeper than we thought. The scientists discovered that dogs cry tears of joy when they see their owners after a period of absence. The scientists conducted a small-scale study on 22 dogs. They tested the behaviour of the dogs. In particular, they looked at how the dogs reacted when they were reunited with their owners and with other people they had daily contact with. The scientists said that when the dogs saw their owners, they cried.