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A fact from Sleep in animals appeared on Wikipedia's Main Page in the Did you know column on 6 January 2008, and was viewed approximately 1,565 times (disclaimer) (check views). The text of the entry was as follows:

Did you know... that some animals interrupt their hibernation a couple of times during winter so that they can sleep?

A record of the entry may be seen at Wikipedia:Recent additions/2008/January.

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Translation

Is this a translation from the swedish article? 213.115.186.132 (talk) 10:30, 23 January 2008 (UTC)[reply]

Yes, it started out that way anyway. We've changed a bit about the seals, to conform to the references given. (I fell in love with Nitramus' article, Sömn hos djur, but I'm not good enough in Swedish, so I recruited a translator here.)

I see that the Swedish article has some new photos, some of which we should borrow. --Hordaland (talk) 13:55, 7 February 2008 (UTC)[reply]

And now, over a year later, I discover there's even a template for translation from (see above). I learn something new every day....... - Hordaland (talk) 00:44, 11 April 2009 (UTC)[reply]

sleep duration line makes no sense

In herbivores, an inverse correlation is apparent between body mass and sleep length; big animals sleep more than smaller ones.

Ok I'm not an expert here, but this makes no sense to me. Is it an inverse correlation or a positive one? —Preceding unsigned comment added by 68.149.184.246 (talk) 12:18, 31 October 2009 (UTC)[reply]

Merge suggestion

There is a merge suggestion on this page. It reads "It has been suggested that this article or section be merged into [[:|Sleep patterns#Sleep in non-humans]]. (Discuss) Proposed since June 2012." The "Discuss" isn't clickable, so I'll discuss here.

I think both articles are long enough as it is, and the division is logical.

--Hordaland (talk) 07:09, 4 August 2012 (UTC)[reply]

I agree. In fact, in the hope of saving work for everybody, I've gone ahead and boldly removed the template. If anybody feels that a full discussion is necessary, please feel free to put the template back. Looie496 (talk) 02:34, 5 August 2012 (UTC)[reply]

I third. Frankly I think if anything human sleep should be separate, not nonhuman sleep, as humans only make up a tiny fraction of the animals that sleep. 72.251.19.136 (talk) 07:30, 22 August 2012 (UTC)[reply]

Unihemispheric sleep

In the cat experiment, it is mentioned that the brain stem is cut into half. How can the brain stem be cut into half? I suppose it is the corpus callosum that is cut into half. Will someone check on the cat experiment?

Haaaa (talk) 09:13, 5 January 2014 (UTC)[reply]

It doesn't exactly say "cut in half". It says "the connection between the left and the right halves of the brain stem has been severed...".

The reference title in English is "Chronic split brain stem preparation: Effect on the sleep-waking cycle". The brain stem is split.

Anyone wanting to check the reference, must be able to read French.

--Hordaland (talk) 10:35, 5 January 2014 (UTC)[reply]

It's not that hard, I think you just expose the brain stem and then run a scalpel down the middle of it. Looie496 (talk) 23:25, 5 January 2014 (UTC)[reply]

Shrews

I learnt that shrews have extremely little sleep, in the order of minutes rather than hours. Is this right? Shouldn't the article mention that? Steinbach (talk) 13:10, 26 March 2017 (UTC)[reply]

Article-Image Disagreement

The article says a jellyfish "is the most primitive organism in which sleep-like states have been observed." The image next to it says a nematode "is the most primitive organism in which sleep-like states have been observed." Which of these is more "primitive." — Preceding unsigned comment added by Ambroginogiusti (talk • contribs) 18:49, 17 July 2018 (UTC)[reply]

If we translate "more primitive" as "evolutionarily more distant from vertebrates", then jellyfish are more primitive, as they are not bilaterians. If we are asking which species is more complex, I think that would be difficult. (The discovery of sleep in jellyfish is quite recent, by the way.) Looie496 (talk) 20:24, 17 July 2018 (UTC)[reply]

Revision as of 18:50, 17 July 2018 edit SineBot (talk \| contribs) Bots 2,553,283 edits m Signing comment by Ambroginogiusti - "→Article-Image Disagreement: new section" ← Previous edit		Revision as of 20:24, 17 July 2018 edit undo Looie496 (talk \| contribs) 25,746 edits →Article-Image Disagreement: reply Next edit →
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	The article says a jellyfish "is the most primitive organism in which sleep-like states have been observed." The image next to it says a nematode "is the most primitive organism in which sleep-like states have been observed." Which of these is more "primitive." <!-- Template:Unsigned --><small class="autosigned">— Preceding [[Wikipedia:Signatures\|unsigned]] comment added by [[User:Ambroginogiusti\|Ambroginogiusti]] ([[User talk:Ambroginogiusti#top\|talk]] • [[Special:Contributions/Ambroginogiusti\|contribs]]) 18:49, 17 July 2018 (UTC)</small> <!--Autosigned by SineBot-->		The article says a jellyfish "is the most primitive organism in which sleep-like states have been observed." The image next to it says a nematode "is the most primitive organism in which sleep-like states have been observed." Which of these is more "primitive." <!-- Template:Unsigned --><small class="autosigned">— Preceding [[Wikipedia:Signatures\|unsigned]] comment added by [[User:Ambroginogiusti\|Ambroginogiusti]] ([[User talk:Ambroginogiusti#top\|talk]] • [[Special:Contributions/Ambroginogiusti\|contribs]]) 18:49, 17 July 2018 (UTC)</small> <!--Autosigned by SineBot-->
			:If we translate "more primitive" as "evolutionarily more distant from vertebrates", then jellyfish are more primitive, as they are not [[bilaterian]]s. If we are asking which species is more complex, I think that would be difficult. (The discovery of sleep in jellyfish is quite recent, by the way.) [[User:Looie496\|Looie496]] ([[User talk:Looie496\|talk]]) 20:24, 17 July 2018 (UTC)