1. Dogs have an incredible sense of smell, and their noses are up to 100,000 times more sensitive than human noses. This is why they are often used for tasks such as search and rescue, detecting drugs and explosives.
2. The tallest dog breed in the world is the Great Dane. The current record holder for the world's tallest dog is a Great Dane named Zeus, who stood at 44 inches tall.
3.The oldest known breed of dog is the Saluki, which is believed to have originated in ancient Egypt more than 5,000 years ago.
4. Dogs are capable of understanding and responding to human emotions. Studies have shown that dogs can distinguish between different human facial expressions and tones of voice, and they often mirror their owner's emotions.
5. Dogs are descendants of wolves and were first domesticated by humans over 15,000 years ago.
6. Dogs have a unique way of cooling themselves down. They don't sweat like humans do, but instead, they regulate their body temperature by panting and sweating through their paw pads.
7. There are more than 340 different breeds of dogs recognized by the World Canine Organization (FCI), each with its own unique characteristics and traits.
8. The world's most expensive dog breed is the Tibetan Mastiff, which can sell for over a million pounds!
9. Dogs have three eyelids - an upper eyelid, a lower eyelid, and a third eyelid called the nictitating membrane, which helps protect and lubricate their eyes.
10. Dogs can sense changes in the earth's magnetic field, which may help them navigate and find their way home.