Dog pokes his head out the car window while driving because of the smell

On the Internet there are many funny pictures of dogs, leaning his head out the car window when driving wind blowing wool, and is written on the face of bliss. Dogs apparently like to do it, but for what reason?

The thing smells. Dogs all over rely on your nose as the vision they have not, but the sense of smell is simply stunning. Human olfactory membranes have 5 million. Receptors or "cell smell", but the dog - more than 225 million.

When the air moves over the olfactory membrane, odor molecules are deposited on the receptors and odor detection occurs. The wind blowing in the face with rapid movement, carries a huge amount of diverse information in the canine brain, so the dog pokes his nose out the window to better understand the world and at the same time gain new experiences.

via factroom.ru