We humans share a lot of similarities with dogs, such as personal preferences, social behaviors, facial expressions, and 80 percent of our DNA. We also have many diseases in common, including epilepsy ...

Dogs rely on scent in ways that still surprise researchers. They have up to 300 million olfactory receptors, compared to about 6 million in humans, and can detect smells 10,000 to 100,000 times more ...