Dogs' sense of smell is 10,000 times stronger than humans'.
Dogs can hear about 4 times the distance of a human. And they are capable of locating the source of a sound in 6/100ths of a second by using their swiveling ears like radar dishes.
Dogs doesn't sees the color as humans do. To them color red appears dark brownish-gray (nearly black) .
When a puppy is born, he is blind, deaf, and toothless. They have heat sensors in their noses to find their mother.
Just like human fingerprints, no two dogs' nose prints are alike.
The fastest breed, the Greyhound, can run up to 44 miles per hour ( 71 km per hour ).
National Geographic's Dr. Brady Barr measured a dog's average bite force at 320 pounds of pressure per square inch.
Dogs can be trained to detect cancer and other diseases in humans.
Petting a dog can lower your blood pressure.
Stroking dogs and gazing into their eyes releases the "feel good" hormone oxytocin for both people and dogs.
Dogs can get jealous if they see their humans displaying affection toward something or someone else.