Snail shells are made of calcium carbonate and keep growing as long as the snail grows. They keep adding more calcium carbonate to the edge of the shell until the snail reaches adult size.

Snails move at an incredible slow speed. An average adult moves at a speed of 1 millimeter per second. Snails produce and leave behind a trail of slime as they move which acts as a lubricant. This allows the snail to easily move across any type of terrain without injuring its body.

Land Snails aren’t able to hear at all but they have eyes and olfactory organs. They use their sense of smell to help them find food.

More Info: