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Scientists: Snails don't need to sleep much because their lives are not mentally demanding

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(PhysOrg.com) -- Scientists in Canada noticed pond snails spent around 10 percent of their time attached to the side of their tank with their tentacles partly withdrawn, their shells hanging away from their bodies, and with their feet symmetrical and relaxed. The researchers decided to do some experiments to find out if the snails were asleep or just resting, and their results provide the first evidence that gastropods sleep.

...

The researchers ... found that the sleep patterns followed a two to three day period rather than a 24 hour cycle with clusters of around seven bouts of sleeping over a 13-15 hour period followed by over 30 hours of uninterrupted activity. They did not need to make up for lost sleep, a process known as sleep rebound.

Dr Stephenson said snails do not sleep at a regular time as most other animals do, and they need very little sleep because their lifestyles are not mentally demanding, so they probably do not need tight controls over their sleeping patterns.

http://www.physorg.com/news/2011-02-evidence-snails.html

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:lol: given that snails expend very little energy, I thought it was a given that they wouldn't need much sleep.

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Scientists: Snails don't need to sleep much because their lives are not mentally demanding

Now I can say Iv'e seen it all. :wacko:


sigbet.jpg

"I want to take this opportunity to mention how thankful I am for an Obama re-election. The choice was clear. We cannot live in a country that treats homosexuals and women as second class citizens. Homosexuals deserve all of the rights and benefits of marriage that heterosexuals receive. Women deserve to be treated with respect and their salaries should not depend on their gender, but their quality of work. I am also thankful that the great, progressive state of California once again voted for the correct President. America is moving forward, and the direction is a positive one."

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There's a website that is famous in PhD circles that has nice comics of what happens on the internet and in popular culture with scientific results.

Let me see if I can find it. Ah yes... phdcomics.com

Lets see if I can stick a pic here:

Not the right kind of format I thinks. Newbie.

I think that's about right. I suppose there will be a fair share of readers that personify the 'internets' and 'grandma' parts of the diagram to 100% fidelity!

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