{"id":260839,"date":"2024-09-25T20:04:16","date_gmt":"2024-09-25T20:04:16","guid":{"rendered":"https:\/\/michigandigitalnews.com\/index.php\/2024\/09\/25\/dinosaurs-may-have-run-like-emus-by-keeping-one-foot-on-the-ground\/"},"modified":"2025-06-25T17:11:08","modified_gmt":"2025-06-25T17:11:08","slug":"dinosaurs-may-have-run-like-emus-by-keeping-one-foot-on-the-ground","status":"publish","type":"post","link":"https:\/\/michigandigitalnews.com\/index.php\/2024\/09\/25\/dinosaurs-may-have-run-like-emus-by-keeping-one-foot-on-the-ground\/","title":{"rendered":"Dinosaurs may have run like emus by keeping one foot on the ground"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"\">\n<figure class=\"ArticleImage\">\n<div class=\"Image__Wrapper\"><img fetchpriority=\"high\" decoding=\"async\" class=\"Image\" width=\"1350\" height=\"900\" alt=\"\" src=\"https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg\" sizes=\"(min-width: 1288px) 837px, (min-width: 1024px) calc(57.5vw + 55px), (min-width: 415px) calc(100vw - 40px), calc(70vw + 74px)\" srcset=\"https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=300 300w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=400 400w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=500 500w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=600 600w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=700 700w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=800 800w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=837 837w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=900 900w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1003 1003w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1100 1100w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1200 1200w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1300 1300w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1400 1400w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1500 1500w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1600 1600w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1674 1674w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1700 1700w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1800 1800w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=1900 1900w, https:\/\/images.newscientist.com\/wp-content\/uploads\/2024\/09\/25135416\/SEI_223137131.jpg?width=2006 2006w\" loading=\"eager\" fetchpriority=\"high\" data-image-context=\"Article\" data-image-id=\"2449497\" data-caption=\"Emus always have one foot on the ground when running at an intermediate pace\" data-credit=\"Imagebroker \/ Alamy Stock Photo\"\/><\/div><figcaption class=\"ArticleImageCaption\">\n<div class=\"ArticleImageCaption__CaptionWrapper\">\n<p class=\"ArticleImageCaption__Title\">Emus always have one foot on the ground when running at an intermediate pace<\/p>\n<p class=\"ArticleImageCaption__Credit\">Imagebroker \/ Alamy Stock Photo<\/p>\n<\/div>\n<\/figcaption><\/figure>\n<\/p>\n<p>If you want to imagine a dinosaur running, then perhaps look at emus. They probably shared a similar posture, which makes it most energy efficient to keep one foot on the ground when running at an intermediate pace.<\/p>\n<p><a href=\"https:\/\/www.uu.nl\/staff\/AMvanBijlert\">Pasha van Bijlert<\/a>\u00a0at Utrecht University in the Netherlands and his colleagues wanted to understand why <a href=\"https:\/\/www.newscientist.com\/article-topic\/birds\/\">birds<\/a> have a style of running that is so different to humans.<\/p>\n<p>\n    <iframe title=\"Why do emus run the way they do?\" width=\"1200\" height=\"675\" src=\"https:\/\/www.youtube.com\/embed\/ZZdQaSl8LS4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><br \/>\n    <\/iframe>\n<\/p>\n<p>For instance, emus (<em>Dromaius novaehollandiae<\/em>), which can sprint at up to 50 kilometres per hour, always have one foot on the ground when running at intermediate speeds. This was thought to require much more energy than the \u201caerial\u201d running style, in which both feet are off the ground at the same time, which is seen in other bipeds, such as people.<\/p>\n<p>To learn more, the scientists built a computer model based on an emu and used physics simulations to measure the energy output of different running styles, while varying the bird\u2019s anatomy.<\/p>\n<p>\u201cThese are all changes you can\u2019t really make in a real bird, but they represent differences between different bird species,\u201d says van Biljert. \u201cFor example, quails are very crouched and their tendons probably don\u2019t store a lot of energy. Emus are, comparatively, pretty upright, but their tendons store a lot of energy.\u201d<\/p>\n<p><span class=\"js-content-prompt-opportunity\"\/><\/p>\n<p>We tend to think of running as always having an aerial phase, says van Biljert. \u201cHowever, [for emus] it goes like this: walking, grounded running, aerial running. So they have an extra running style at intermediate speeds. Grounded running appears to be a wasteful running style, because it costs more energy than aerial running.\u201d<\/p>\n<p>But in some cases, grounded running can optimise energy use, he says. \u201cIf your muscles are strongest in very crouched postures, and an upright posture is impossible, then there is a range of running speeds over which grounded running is actually your best choice. Humans don\u2019t do this, because we can stand up straight, but birds can\u2019t.\u201d<\/p>\n<p>Fossil evidence suggests that some <a href=\"https:\/\/www.newscientist.com\/article-topic\/dinosaurs\/\">dinosaurs<\/a> had similar postures to the large running birds alive today. <em>Velociraptors<\/em> and <em>Deinonychuses<\/em> had relatively thin tails and long, feathered forelimbs, resulting in a forward shift to their centre of mass and a more crouched posture, says van Biljert. This resembles the stance of emus, he says.<\/p>\n<p>\u201cWhen explaining dinosaur locomotion to people who haven\u2019t spent a lot of time thinking about such things, I jokingly like to say that the closest thing to a non-avian theropod dinosaur would be an emu with a crocodile tail.\u201d<\/p>\n<p><a href=\"https:\/\/australian.museum\/get-involved\/staff-profiles\/jackie-nguyen\/\">Jacqueline Nguyen<\/a> at the Australian Museum in Sydney says the researchers\u2019 model allowed them to conduct a virtual experiment that provides new insights.<\/p>\n<p>\u201cThe authors suggest that grounded running in birds may have first evolved within non-avian dinosaurs,\u201d says Nguyen. \u201cThis running mode may have been another bird feature that was inherited from their dinosaur ancestors, like bipedality, modified leg bones and feathers.\u201d<\/p>\n<section class=\"ArticleTopics\">\n<p class=\"ArticleTopics__Heading\">Topics:<\/p>\n<\/section><\/div>\n<p>[ad_2]<br \/>\n<br \/><a href=\"https:\/\/www.newscientist.com\/article\/2449446-dinosaurs-may-have-run-like-emus-by-keeping-one-foot-on-the-ground\/?utm_campaign=RSS%7CNSNS&#038;utm_source=NSNS&#038;utm_medium=RSS&#038;utm_content=home\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Emus always have one foot on the ground when running at an intermediate pace Imagebroker \/ Alamy Stock Photo If you want to imagine<\/p>\n","protected":false},"author":1,"featured_media":260840,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[177],"tags":[],"_links":{"self":[{"href":"https:\/\/michigandigitalnews.com\/index.php\/wp-json\/wp\/v2\/posts\/260839"}],"collection":[{"href":"https:\/\/michigandigitalnews.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/michigandigitalnews.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/michigandigitalnews.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/michigandigitalnews.com\/index.php\/wp-json\/wp\/v2\/comments?post=260839"}],"version-history":[{"count":0,"href":"https:\/\/michigandigitalnews.com\/index.php\/wp-json\/wp\/v2\/posts\/260839\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/michigandigitalnews.com\/index.php\/wp-json\/wp\/v2\/media\/260840"}],"wp:attachment":[{"href":"https:\/\/michigandigitalnews.com\/index.php\/wp-json\/wp\/v2\/media?parent=260839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/michigandigitalnews.com\/index.php\/wp-json\/wp\/v2\/categories?post=260839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/michigandigitalnews.com\/index.php\/wp-json\/wp\/v2\/tags?post=260839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}