Not all snakes slither sideways: 7 snake species that can move in a surprisingly straight line

Most people are aware of snakes only because of their characteristic slithering motion from side to side. Not all snakes slither, though. Some are capable of rectilinear locomotion, which implies that the body is moving forward in a nearly straight line with practically no visible curving. Such a movement is especially effective for bulky snakes when stalking prey or squeezing into tight places. Here is a list of seven amazing snakes that can "walk" almost straight, challenging conventional beliefs about snake locomotion.