2. A dog's sense of hearing is four times better than a human's.
3. Dogs can recognize their owners' voices and distinguish them from other people's voices
4. Dogs can learn to recognize up to 250 words and commands
5. Dogs can understand human body language and facial expressions
6. Dogs can detect cancer in humans through their sense of smell
7. The oldest dog on record lived to be 29 years old
8. Dogs can be trained to detect earthquakes, locate missing people, and even predict seizures in humans
9. Some dogs can be trained to detect low blood sugar levels in diabetics
10. Dogs can have a positive impact on their owners' mental and physical health, including reducing stress, lowering blood pressure, and increasing social interaction
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