[quote]Rather than being part of a 24-hour day, their sleep cycle lasted two to [b]three[/b] days. Over a period of 13 to 15 hours, snails sleep in around seven bouts. This sleeping period is followed by roughly 30 hours of activity.[/quote] In case anybody is actually curious. Also, this: [quote]Snail can sleep for 3 years. The reason snails sleep are they alike many other animals hibernate. Hibernation means that snails sleep when weather becomes excessively cold; it is a necessary for the survival of snails.[/quote]