Why do dogs have cold noses?

Have you ever wondered why dogs have cold, wet noses? It might seem strange for a warm-blooded animal to have a cold, wet nose, but it's actually a fantastic adaptation that supercharges a dog's sense of smell and helps to regulate their body temperature. Cold nose and sense of smell A dog's nose is covered in a thin layer of mucus, which keeps it moist. Why is this helpful? Smell molecules travel through the air, but are easier to capture when they can attach to something, in this case, the...