HartsfieldâJackson Atlanta International Airport has been the world's busiest airport every year since 2000; with all airports combined London has the world's busiest city airport system by passenger count.
Tension or Temperature. Dogs may shake as a way of relieving tension. If a dog is feeling nervous or uncomfortable in a situation, it might shake the whole body as a way of shaking out tension. This behavior also may function as a means of getting attention from other dogs or people.
Like most mammals, for the first part of their lives, baby puppies suckle happily and hungrily at the milk-swollen dugs of their mother. Once grown, however, the majority of adult dogs do not produce enough lactase to break down, process, and digest lactose, a sugar that occurs naturally in milk.