{"id":1314,"date":"2026-06-01T17:36:47","date_gmt":"2026-06-01T17:36:47","guid":{"rendered":"https:\/\/relocationtimess.com\/?p=1314"},"modified":"2026-06-01T17:36:47","modified_gmt":"2026-06-01T17:36:47","slug":"sleep-has-many-benefits-why-do-humans-as-a-species-get-so-little","status":"publish","type":"post","link":"https:\/\/relocationtimess.com\/?p=1314","title":{"rendered":"Sleep has many benefits. Why do humans as a species get so little?"},"content":{"rendered":"<div>\n<div>\n<p>\n            Experts advise that adults should sleep for around eight uninterrupted hours in a cool, dark room. If you do so consistently, they say, you can add years to your life.\n<\/p><p>Read more <a href=\"https:\/\/relocationtimess.com\/?p=1304\">White House hasn\u2019t offered solution to GOP concerns over \u2018anti-weaponization\u2019 fund, leaving immigration agenda in limbo<\/a><\/p>\n<p>\n            It\u2019s an ideal many people fail to live up to. It\u2019s also, according to \u201cThe Sleepless Ape: The Story of Sleep in Human Evolution,\u201d which published May 19, not how humans have slept for most of our evolutionary history.\n    <\/p>\n<p>\n            Anthropologist David Samson, the book\u2019s author and an associate professor at the University of Toronto, has scaled trees to study chimpanzee beds and visited remote tribes to understand how the story of human sleep unfolded.\n    <\/p>\n<p>\n            Samson\u2019s findings reveal how human sleep patterns became shorter, deeper and more flexible than those of our more ape-like ancestors, freeing time to spend on toolmaking, social interactions and migration around the world.\n    <\/p>\n<p>\n            He argues that these unique sleep habits fostered survival, innovation and shaped our species\u2019 behavior in pivotal ways. Today\u2019s sleep-deprived humans can also learn a great deal from how our ancestors used to sleep, he adds.\n    <\/p>\n<p>\n            \u201cSleep governs so much of our mental and physical performance throughout the day,\u201d he told CNN. \u201cHow is it then that we are the shortest sleeping primate on the planet?\u201d\n    <\/p>\n<p>\n<em>This interview has been edited for length and clarity.<\/em>\n<\/p>\n<p>\n<strong>CNN: Your book is called \u201cThe Sleepless Ape.\u201d Why\u2019s that? <\/strong>\n<\/p>\n<div>\n<div>\n\n<figure class=\"wp-block-image size-large\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" alt=\"\" class=\"wp-image-1310\" height=\"1024\" src=\"https:\/\/relocationtimess.com\/wp-content\/uploads\/2026\/06\/21c749826bfb2df96141d7900b527033.jpg\" width=\"660\" srcset=\"https:\/\/relocationtimess.com\/wp-content\/uploads\/2026\/06\/21c749826bfb2df96141d7900b527033.jpg 660w, https:\/\/relocationtimess.com\/wp-content\/uploads\/2026\/06\/21c749826bfb2df96141d7900b527033-193x300.jpg 193w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\" \/><\/figure>\n<\/figure>\n\n<\/div>\n<div>\n<div>\n<div>\n<div>\n<span>&#8220;The Story of Sleep in Human Evolution&#8221; was published May 19.<\/span>\n<\/div>\n<figcaption>Princeton University Press<\/figcaption>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\n<strong>David Samson:<\/strong> It took about 15 years to get the prerequisite number of primate sleep studies to be able to actually run these stats, and it turns out these models were predicting that humans should sleep 10 \u00bd hours. I don\u2019t know about you, but I certainly don\u2019t sleep 10 \u00bd hours. The human average across cultures is probably something like seven hours. The model was predicting that we sleep much longer, which means that humans are an evolutionary outlier.\n    <\/p>\n<p>\n            Humans are not only the shortest sleeping primate, but we also get the greatest proportion of REM sleep of any primate on the planet. And what \u201cThe Sleepless Ape\u201d tries to explore and disentangle is the story of how that came to be.\n    <\/p>\n<p>\n<strong>CNN: Your book details how our ancestral species left the safety of sleeping in trees for the dangerous ground as a result of shelter, fire and social sleeping. How did that shift benefit us? <\/strong>\n<\/p>\n<p>\n<strong>Samson:<\/strong> What we created was a completely new innovative space for sleep, and the analogy I\u2019ve been using here is a shell.\n    <\/p>\n<p>\n            We do know that early humans like Homo erectus were sleeping in groups. We can tell that right around this time there was likely the controlled use of fire. And because of the fact that you have a much larger group with demographic variability \u2014 you\u2019ve got some grandparents in the group, you got some teens in the group \u2014you likely had a situation where someone was awake 24\/7 to sound the alarm in case of danger. It\u2019s very clear to me that a hunter-gatherer camp would have been adapted to have larks and owls relatively distributed, such that the shell is a little bit more safe during a 24-hour period.\n    <\/p>\n<p>\n            Many of your readers may think: \u201cFor me to get the perfect amount of sleep, I need isolation from people, I need isolation from stimulus.\u201d But almost all the small-scale environments that I\u2019ve ever done research in are highly dynamic environments. There is this pervasive sense of safety once you come back into the camp. It\u2019s this little bubble, it\u2019s this shell: \u201cI can finally let my guard down.\u201d\n    <\/p>\n<div>\n<header>\n<span>\n      Related article\n    <\/span>\n<\/header>\n<section>\n<div>\n<div>\n<div>\n\n<figure class=\"wp-block-image size-full\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" alt=\"Medieval stained glass church window panel showing a married couple sleeping\" class=\"wp-image-1311\" height=\"144\" src=\"https:\/\/relocationtimess.com\/wp-content\/uploads\/2026\/06\/bf0c7e874cc264a97e25c9bf02075fb7.jpg\" width=\"256\"\/><\/figure>\n<\/figure>\n\n<\/div>\n<div>\n<div>\n<div>\n<div>\n<span>Medieval stained glass church window panel showing a married couple sleeping<\/span>\n<\/div>\n<figcaption>TonyBaggett\/iStockphoto\/Getty Images<\/figcaption>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div>\n<p>\n<span>How our ancestors used to sleep can help the sleep-deprived today<\/span>\n<\/p>\n<div>8  min read<\/div>\n<\/div>\n<\/section>\n<\/div>\n<p>\n<strong>CNN: Humans have more REM sleep than other primates despite sleeping less in total. Why\u2019s that?<\/strong>\n<\/p>\n<p>\n<strong>Samson: <\/strong>When you\u2019re in phasic REM, you\u2019re as dead to the world as you\u2019ll ever be. For our ancient ancestors, it was extremely costly to be in this state, but if you\u2019ve built the shell, all of a sudden you have a new opportunity to get this really valuable sleep at higher proportions than other animals.\n    <\/p><p>Read more <a href=\"https:\/\/relocationtimess.com\/?p=1300\">Is the state of the economy affecting or changing how you\u2019ll vote in November? Share your story<\/a><\/p>\n<p>\n            REM is the sleep stage famously associated with dreaming.<br\/>It\u2019s associated with creativity and innovation, all the things that would have been, I think, prerequisite for us becoming a successful species.\n    <\/p>\n<p>\n<strong>CNN: Why did you study chimpanzee beds? <\/strong>\n<\/p>\n<p>\n<strong>Samson: <\/strong>I\u2019ve climbed a lot of trees. Great apes are very unique, and they build these nests that are basically tree beds. It\u2019s fascinating. These nests keep them warm. Because they\u2019re not on the ground, they\u2019re solving for big predators. And because they\u2019re made using plants that actually repelled insects, they\u2019re also solving for micro predators.\n    <\/p>\n<div>\n<div>\n\n<figure class=\"wp-block-image size-medium_large\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" alt=\"A chimpanzee lies in a sleeping nest in a tree canopy in Tanzania's Gombe Stream National Park.\" class=\"wp-image-1312\" height=\"512\" src=\"https:\/\/relocationtimess.com\/wp-content\/uploads\/2026\/06\/0c5a6303fc2fedec83f016127cb08168.jpg\" width=\"768\" srcset=\"https:\/\/relocationtimess.com\/wp-content\/uploads\/2026\/06\/0c5a6303fc2fedec83f016127cb08168.jpg 768w, https:\/\/relocationtimess.com\/wp-content\/uploads\/2026\/06\/0c5a6303fc2fedec83f016127cb08168-300x200.jpg 300w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n<\/figure>\n\n<\/div>\n<div>\n<div>\n<div>\n<div>\n<span>A chimpanzee lies in a sleeping nest in a tree canopy in Tanzania&#8217;s Gombe Stream National Park.<\/span>\n<\/div>\n<figcaption>dpa\/picture alliance\/Alamy Stock Photo<\/figcaption>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>\n            Being able to measure their beds in situ allowed me to peek into the mind of a chimpanzee. And those are all the things that our human ancestors had to solve when we began to sleep on the ground and lost that unique sleep site.\n    <\/p>\n<p>\n<strong>CNN: You\u2019ve spent time with one of the last remaining hunter-gatherer tribes on Earth, the Hadza in northern Tanzania. What did they teach you about sleep? <\/strong>\n<\/p>\n<p>\n<strong>Samson: <\/strong>I think we in the West, in a way,  have been fetishizing sleep as a culture. When you ask hunter-gatherers whether or not they like their sleep, they overwhelmingly say, \u201cI love my sleep.\u201d This is a mystery, because I know empirically they have more fragmented sleep. So, what the hell is going on? I think the resolution of this gets us to the body clock: circadian rhythms. If you look at the 24-hour period, most people spend more than 90% of their time indoors. This is abysmal.\n    <\/p>\n<div>\n<header>\n<span>\n      Related article\n    <\/span>\n<\/header>\n<section>\n<div>\n<div>\n<div>\n\n<figure class=\"wp-block-image size-full\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" alt=\"Best Tested 3.jpg\" class=\"wp-image-1313\" height=\"144\" src=\"https:\/\/relocationtimess.com\/wp-content\/uploads\/2026\/06\/c843d97eee7d9c8fede867dc26a7f635.jpg\" width=\"256\"\/><\/figure>\n<\/figure>\n\n<\/div>\n<div>\n<div>\n<div>\n<div>\n<\/div>\n<figcaption>Mike Andronico\/CNN Underscored<\/figcaption>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div>\n<p>\n<span>The best headphones for sleeping in 2026, tried and tested (Courtesy CNN Underscored)<\/span>\n<\/p>\n<\/div>\n<\/section>\n<\/div>\n<p>\n            Unless we understand how to augment and leverage the timing of our biological clocks, we\u2019re always going to be doomed to have a weird, maybe dysfunctional or dysregulated relationship with our sleep.\n    <\/p>\n<p>\n<strong>CNN: How has your work on paleo sleep \u2013 sleeping like our ancestors \u2013  informed your own sleep habits? <\/strong>\n<\/p>\n<p>\n<strong>Samson: <\/strong>My relationship with light has improved my sleep so much. I throw my alarms out and I let the sun do the waking. No blackout curtains or losing the cues of your outside environment. When I wake up with my morning coffee, I go outside and I share it with the sun. At noon, when you\u2019re eating lunch, even if it\u2019s a crappy day, it\u2019s overcast, it\u2019s raining, it\u2019s cold, go out.\n    <\/p>\n<p>\n            At night, when the sun goes down, that\u2019s my primary cue to reduce exposure to blue light from artificial sources like screens. I might still use my phone, for example, but I\u2019ll switch it to dark mode<strong>. <\/strong>And make sure that if you\u2019re walking around your house, and I\u2019ve been doing this for years now, it\u2019s with little lanterns that are 2,700 kelvins and below, so it\u2019s warm light lanterns. You just charge them in a USB port. Candlelight is even better. And also metabolic timing. My last calorie is three to four hours before my actual target bedtime.\n    <\/p>\n<p>\n            If anybody is having trouble with their sleep, worry less about the sleep and start asking yourself, \u201cAre you in evolutionary sync, or are you in evolutionary de-sync?\u201d Insomnia is a great example of a classic evolutionary mismatch: the idea that we evolved for are how things <em>were<\/em>, not how things <em>are<\/em>. Insomnia is hypervigilance. Our ancestors had hypervigilance, and there was probably a very good reason why they did. They had lived in dynamic environments, and you\u2019re the descendants of them.\n    <\/p>\n<p>\n            I think we\u2019re on the cusp of a sleep enlightenment in a way, because we\u2019ve made all these gains with the comfort of our sleep site, with the safety of our sleep site, but what we\u2019ve lost in turn is the connection with our circadian physiology. If we can marry both those things, I think we can really change our sleep and health well-being for the better in the future based on both an understanding of our evolutionary history and of modern sleep science.\n    <\/p>\n<p>\n    Sign up for CNN\u2019s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more.\n<\/p><p>Read more <a href=\"https:\/\/relocationtimess.com\/?p=1298\">A Supreme Court skeptical of death row appeals has recently sided with three inmates<\/a><\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Anthropologist and author David Samson examines how the story of human sleep unfolded in his new book, \u201cThe Sleepless Ape.\u201d<\/p>\n","protected":false},"author":1,"featured_media":1305,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,8],"tags":[],"class_list":["post-1314","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-life","category-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sleep has many benefits. 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