PHDID YOU KNOW? 
A snail can sleep for three years.
Snails need moisture to survive; so if the weather is not cooperating, they can actually sleep up to three years. It has been reported that depending on geography, snails can shift into hibernation (which occurs in the winter), or estivation (also known as ‘summer sleep’), helping to escape warm climates.
During this time, the snails will secrete mucus over their bodies to protect themselves from the dry, hot weather. As glamorous as it may sound, snails don’t always sleep for three years in their own mucus. When the weather is just right, snails do tend to follow a pretty regular sleeping schedule.
(s)azpetvet
