How Can A Snake Move Without Legs?

On the underside of the snake there are broad scales. These are moved forward in such a way that the rear edge of each scale pushes against something in the ground. When the scales are pushed against these rough and irregular spots in the ground, the whole snake is moved forward. But the really strange thing about the snake's walking is how those scales are made to move and it has a great number of ribs. So the "legs" of the snake are its ribs and the "feet" are the scales.

When the snake wants to make speed, it throws its body into an S-shaped curve, this loop or curve pushes against anything it touches and the snake glides forward swiftly. Oddly enough, in the skeletons of certain snakes like the boas, it can watch traces of hind legs which they lost in the progression of evolution. So, may be at one time snakes did have real legs.

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