<human>:  What is the difference between a tortoise and a turtle?
<bot>: The main difference between a tortoise and a turtle is that tortoises are land animals and turtles live in water. This is because tortoises have adapted differently to their environment than turtles, with land-dwelling tortoises having thicker and more rounded shells and flatter feet. Turtles, on the other hand, have more streamlined shells and webbed feet adapted for swimming. Additionally, tortoises are generally longer-living than turtles and also have a longer lifespan.