Some of the best navigators on Earth don\u2019t have GPS. They don\u2019t even have much of a brain.<\/p>\n
One of them is a beetle. A dung beetle.<\/strong><\/p>\n On the darkest, moonless nights, it can roll a ball of dung in an almost perfectly straight line<\/p>\n across open ground, and for years no one could explain how.<\/p>\n The answer turned out to be written across the entire sky.<\/p>\n To a dung beetle, a fresh pile of dung is treasure, and the competition for it is brutal.<\/p>\n Males quickly sculpt the dung into a ball and roll it away as fast as they can, often hauling a<\/p>\n female along for the ride.<\/p>\n The single most important rule is to roll in a straight line.<\/strong> Any curve risks looping back into<\/p>\n the chaos of the pile, where rivals are waiting to wrestle the ball away.<\/p>\n Before it sets off, the beetle even climbs on top of its ball and performs a little rotating \u201cdance\u201d,<\/p>\n scanning the sky.<\/p>\n The puzzle was simple to state and maddening to answer: what compass does a beetle use in<\/p>\n the dark?<\/p>\n Researchers at Sweden\u2019s Lund University<\/strong>, led by biologist Marie Dacke, kept running into<\/p>\n the same strange result during fieldwork in South Africa. Even on clear nights with no moon at<\/p>\n all, the beetles still rolled in dead-straight lines.<\/p>\n So the team tried something unusual. They carried the beetles into a planetarium<\/strong> in<\/p>\n Johannesburg, where they could switch the night sky on and off, or leave only certain features<\/p>\n glowing overhead.<\/p>\n The results were striking. Under a full starry sky, or even with only the Milky Way<\/strong> projected<\/p>\n above them, the beetles rolled straight and fast. But under a cloudy dome, or when shown<\/p>\n only a handful of bright stars, they circled aimlessly. With tiny cardboard caps taped over their<\/p>\n eyes, they were lost completely.<\/p>\n The conclusion, published in the journal Current Biology<\/span><\/a>, made history: the dung beetle<\/p>\n became the first animal ever shown to navigate using the Milky Way.<\/strong><\/p>\n A human glancing up picks out individual stars. The beetle sees something different, and<\/p>\n arguably more useful.<\/p>\n Its eyes are far more sensitive to faint light than ours, or even a honeybee\u2019s. Instead of<\/p>\n resolving single stars, it reads the broad band of light<\/strong> that the Milky Way smears across the<\/p>\n sky.<\/p>\n That glowing stripe behaves like a fixed line on a compass. As long as the beetle keeps it at a<\/p>\n steady angle, it keeps rolling straight.<\/p>\n Later work at Lund suggested the insect does something even more sophisticated: it takes a<\/p>\n kind of mental \u201csnapshot\u201d<\/strong> of the whole sky during that dance on top of the ball, then uses<\/p>\n the stored image to hold its bearing.<\/p>\n It is a remarkable feat of memory, run on a brain smaller than a grain of rice, solving a<\/p>\n problem that stumped human sailors for centuries.<\/p>\n Here\u2019s where the story leaves the dung pile behind. Engineers have spent decades trying to<\/p>\n build machines that can navigate without GPS<\/strong>, in tunnels, deep underwater, or in orbit,<\/p>\n where satellite signals can fade or be jammed.<\/p>\n A team at the University of South Australia <\/span>realized the beetle had already solved a version of<\/p>\n that exact problem, hundreds of millions of years ago.<\/p>\n Using the insect as a blueprint, researchers including PhD candidate Yiting Tao and Professor<\/p>\n Javaan Chahl built an AI-powered orientation sensor<\/strong> that reads patterns of light much the<\/p>\n way the beetle reads the Milky Way.<\/p>\n The aim is a cheap, robust backup navigation system<\/strong> that could help stabilize satellites and<\/p>\n guide drones and robots through low light, even when motion and vibration blur everything<\/p>\n around them.<\/p>\n Strikingly, an animal that evolved more than 130 million years ago<\/strong> may help keep<\/p>\n tomorrow\u2019s spacecraft pointed the right way.<\/p>\n There\u2019s a humbling lesson buried in all of this. Insects run their entire navigation systems on a<\/p>\n few tens of thousands of neurons. Our machines burn through vastly more computing power<\/p>\n and still wrestle with the same tasks.<\/p>\n Nature had millions of years to test and refine its solutions, and packed them into bodies<\/p>\n smaller than a thumbnail.<\/p>\n The dung beetle is only one example. Migratory birds, moths, and even seals<\/strong> all read the<\/p>\n sky in their own ways, and most of those methods are still only partly understood. Each one is<\/p>\n a potential blueprint hiding in plain sight.<\/p>\n The next great leap in how our machines find their way might not come from a laboratory at<\/p>\n all. It might come from watching a small, single-minded beetle roll a ball of dung beneath the<\/p>\n stars.<\/p>\n","protected":false},"excerpt":{"rendered":" Some of the best navigators on Earth don\u2019t have GPS. They don\u2019t even have much of a brain. One of them is a beetle. A dung beetle. On the darkest, moonless nights, it can roll a ball of dung in an almost perfectly straight line across open ground, and for years no one could explain … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":23605,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"rank_math_focus_keyword":"beetle","rank_math_title":"","rank_math_description":"","footnotes":""},"categories":[26],"tags":[],"class_list":["post-23583","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-space"],"_links":{"self":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/posts\/23583","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/comments?post=23583"}],"version-history":[{"count":0,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/posts\/23583\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/media\/23605"}],"wp:attachment":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/media?parent=23583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/categories?post=23583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/tags?post=23583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Why walking in a straight line is a matter of survival<\/h2>\n
The planetarium experiment that cracked the mystery<\/h2>\n
What the beetle actually sees<\/h2>\n
From the African savannah to Earth\u2019s orbit<\/h2>\n
Why a beetle still beats our best machines<\/h2>\n