A turtle using treads and carrying a passenger

Treads are a simple mechanism used by certain animals to travel quickly, often while carrying passengers. The Big Green turtles are well known for using them, though other animals, such as the armadillos and chameleons, are also known to do so.


The treads consist of a central body, which connects two rows of wheels, around which are wrapped two treads. While standing on the treads, an animal may, by walking backwards, be propelled forward.

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