{"id":121458,"date":"2024-11-03T04:28:50","date_gmt":"2024-11-02T21:28:50","guid":{"rendered":"https:\/\/hotvideos24.online\/?p=121458"},"modified":"2024-11-03T04:28:50","modified_gmt":"2024-11-02T21:28:50","slug":"the-age-of-dinosaurs-ended-with-not-one-but-two-asteroids-scientists-now-say","status":"publish","type":"post","link":"https:\/\/hotvideos24.online\/?p=121458","title":{"rendered":"The Age of Dinosaurs Ended With Not One but Two Asteroids, Scientists Now Say"},"content":{"rendered":"<p> <script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-layout-key=\"-fb+5w+4e-db+86\"\r\n     data-ad-client=\"ca-pub-3711241968723425\"\r\n     data-ad-slot=\"7910942971\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><br \/>\n<\/p>\n<div>\n<p class=\"u-speakableText-p1\">Around 66 million years ago, the <a href=\"https:\/\/www.cnet.com\/tech\/the-dinosaur-killing-asteroid-scientists-now-believe-they-know-its-origin-story\/\" target=\"_self\" rel=\"noopener\">dinosaurs were killed by an enormous asteroid<\/a> that hit what is today Chicxulub, Mexico. But a second asteroid struck during that same era at the Nadir crater off the coast of Guinea in western Africa &#8212; proving once and for all that nature really had it in for the poor dinos.<\/p>\n<p class=\"u-speakableText-p2\">A study <a href=\"https:\/\/www.nature.com\/articles\/s43247-024-01700-4.epdf?sharing_token=8ENtH9r_kd7chocopCcOh9RgN0jAjWel9jnR3ZoTv0N8hRVdmSN8MAtJRoCrXUr3bakAO6W45-OCxxNwOrDLfjO92vtTNZWBpofjFg3UekRWoyVgnH8K_Ib6u-33J1JmjseMDAKVAtRAeB0_Opxc46LEcn4w1pYpS7XJ2_Gi8Yw%3D\" rel=\"noopener nofollow\" target=\"_blank\" class=\"c-regularLink\">published in Nature<\/a> shows off the Nadir crater in ways science had not previously seen it. Led by Uisdean Nicholson, a geologist at Heriot-Watt University in Scotland, scientists used 3D seismic data to measure the impact and were able to reverse engineer the size of the asteroid, its angle of impact, how fast it was going and the impact it had on the seabed and underlying rock.<\/p>\n<p>The asteroid was likely 450 to 500 meters in size, traveling at 20 kilometers per second and hit the Earth at a 20- to 40-degree angle from the northeast, the study says.<\/p>\n<p>&#8220;There are around 20 confirmed marine craters worldwide, and none of them has been captured in anything close to this level of detail. It&#8217;s exquisite,&#8221; <a href=\"https:\/\/phys.org\/news\/2024-10-mile-asteroid-impact-crater-atlantic.html\" rel=\"noopener nofollow\" target=\"_blank\" class=\"c-regularLink\">Nicholson told Phys.org<\/a>. &#8220;Craters on the surface are usually heavily eroded and we can only see what is exposed, whereas craters on other planetary bodies usually only show the surface expression. These data allow us to image this fully in three dimensions and peel back the layers of sedimentary rock to look at the crater at all levels.&#8221;<\/p>\n<p>Among other things, the study proved that the crater was, in fact, the result of an asteroid impact and that it took place around the same time as the asteroid that killed the dinosaurs, which was 66 million years ago at the end of the Cretaceous period. So, while the Chicxulub asteroid was the one that killed the dinosaurs, it seems it may have had a little help from the asteroid that hit the Nadir crater.\u00a0<\/p>\n<h2>The anatomy of an asteroid impact<\/h2>\n<figure class=\"c-shortcodeImage u-clearfix c-shortcodeImage-large c-shortcodeImage-hasCaption\">\n<div class=\"c-shortcodeImage_imageContainer\"><!----> <\/p>\n<div class=\"c-cmsImage c-shortcodeImage_image\"><picture class=\"c-cmsImage_image\"><source media=\"(max-width: 767px)\" srcset=\"https:\/\/www.cnet.com\/a\/img\/resize\/2f82fbc709e28cea723677ece355af20a433ed21\/hub\/2024\/10\/04\/caf5e530-ccf3-47af-8b70-eb68678a0f25\/screenshot-2024-10-04-at-13-15-29-3d-anatomy-of-the-cretaceous-paleogene-age-nadir-crater-communications-earth-environment.png?auto=webp&amp;width=768\" alt=\"Cross-section showing an asteroid's likely impact on the Earth\"><source media=\"(max-width: 1023px)\" srcset=\"https:\/\/www.cnet.com\/a\/img\/resize\/cfe8bead81a9cecdd2da13f1526156924e2e08be\/hub\/2024\/10\/04\/caf5e530-ccf3-47af-8b70-eb68678a0f25\/screenshot-2024-10-04-at-13-15-29-3d-anatomy-of-the-cretaceous-paleogene-age-nadir-crater-communications-earth-environment.png?auto=webp&amp;width=1024\" alt=\"Cross-section showing an asteroid's likely impact on the Earth\"><source media=\"(max-width: 1440px)\" srcset=\"https:\/\/www.cnet.com\/a\/img\/resize\/e1d99b7aa420a1e17f4de4b01bb97ad6755ba52f\/hub\/2024\/10\/04\/caf5e530-ccf3-47af-8b70-eb68678a0f25\/screenshot-2024-10-04-at-13-15-29-3d-anatomy-of-the-cretaceous-paleogene-age-nadir-crater-communications-earth-environment.png?auto=webp&amp;width=1200\" alt=\"Cross-section showing an asteroid's likely impact on the Earth\"><img decoding=\"async\" src=\"\" alt=\"Cross-section showing an asteroid's likely impact on the Earth\" height=\"1262.240663900415\" width=\"1200\" loading=\"lazy\"\/> <img decoding=\"async\" src=\"https:\/\/www.cnet.com\/a\/img\/resize\/e1d99b7aa420a1e17f4de4b01bb97ad6755ba52f\/hub\/2024\/10\/04\/caf5e530-ccf3-47af-8b70-eb68678a0f25\/screenshot-2024-10-04-at-13-15-29-3d-anatomy-of-the-cretaceous-paleogene-age-nadir-crater-communications-earth-environment.png?auto=webp&amp;width=1200\" alt=\"Cross-section showing an asteroid's likely impact on the Earth\" height=\"1262.240663900415\" width=\"1200\"\/><\/source><\/source><\/source><\/picture><\/div>\n<p> <!----> <!----><\/div><figcaption><span class=\"c-shortcodeImage_caption g-inner-spacing-right-small g-text-xxsmall\"><\/p>\n<p>The asteroid would&#8217;ve hit with incredible violence, displacing water in the area for up to a minute.<\/p>\n<p><\/span> <span class=\"c-shortcodeImage_credit g-inner-spacing-right-small g-outer-spacing-top-xsmall g-color-text-meta g-text-xxxsmall\">Nicholson, Powell, Gulick, Kenkmann, Bray, Duarte, Collins<\/span><\/figcaption><\/figure>\n<div class=\"c-newsletterSubscribeHighlight g-grid-container g-inner-spacing-top-medium g-inner-spacing-bottom-medium u-flexbox sm:u-hidden c-newsletterSubscribeHighlight-pageArticle g-border-thin-dark-top g-border-thin-dark-bottom c-newsletterSubscribeHighlight-narrow\">\n<div class=\"c-newsletterSubscribeHighlight_content u-flexbox u-flexbox-column u-flexbox-justifyCenter\">\n<div class=\"c-newsletterSubscribeHighlight_message u-flexbox\"><svg id=\"hero-envelope-open\" viewbox=\"0 0 24 24\" class=\"c-newsletterSubscribeHighlight_messageIcon g-outer-spacing-right-medium\"><path d=\"M10.5777 2.16401C11.4656 1.68589 12.5344 1.68589 13.4223 2.16401L20.9223 6.20247C21.894 6.72571 22.5 7.74024 22.5 8.84388V19.5C22.5 21.1568 21.1569 22.5 19.5 22.5H4.5C2.84315 22.5 1.5 21.1568 1.5 19.5L1.5 9.90663C1.5 9.90644 1.5 9.90682 1.5 9.90663L1.5 8.99997C1.5 8.99987 1.5 9.00007 1.5 8.99997L1.5 8.84388C1.5 7.74023 2.10597 6.72571 3.0777 6.20247L10.5777 2.16401ZM3 12.5041V19.5C3 20.3284 3.67157 21 4.5 21H19.5C20.3284 21 21 20.3284 21 19.5V12.5041C20.9744 12.5189 20.9485 12.5334 20.9223 12.5475L15.6712 15.375L19.1056 17.2243C19.4703 17.4206 19.6067 17.8755 19.4104 18.2402C19.214 18.6049 18.7591 18.7413 18.3944 18.545L12.7112 15.4847C12.2672 15.2457 11.7328 15.2457 11.2889 15.4847L5.60557 18.545C5.24087 18.7413 4.78602 18.6049 4.58965 18.2402C4.39327 17.8755 4.52972 17.4206 4.89442 17.2243L8.32879 15.375L3.0777 12.5475C3.05153 12.5334 3.02563 12.5189 3 12.5041ZM9.91074 14.5232L10.5777 14.164C11.4656 13.6859 12.5344 13.6859 13.4223 14.164L14.0893 14.5232L20.2112 11.2268C20.697 10.9651 21 10.4579 21 9.90606V8.84388C21 8.29206 20.697 7.78479 20.2112 7.52318L12.7112 3.48471C12.2672 3.24566 11.7328 3.24566 11.2889 3.48471L3.78885 7.52317C3.30299 7.78479 3 8.29206 3 8.84388V9.90606C3 9.90593 3 9.90619 3 9.90606C3.00015 10.4577 3.3031 10.9652 3.78885 11.2268L9.91074 14.5232Z\"\/><\/svg><br \/>\n      From talking fridges to iPhones, our experts are here to help make the world a little less complicated.\n    <\/div>\n<\/div><\/div>\n<p>Perhaps more frightening is the blow-by-blow result of the impact, which scientists were also able to reconstruct. According to the study, the asteroid would have displaced all of the water in the area, which was around 800 meters deep at that time, shooting a massive &#8220;train of tsunamis&#8221; into the Atlantic Ocean.\u00a0<\/p>\n<p>Sediment would&#8217;ve rushed in to fill the new hole made by the impact, causing a brim to form. Some of the sediment would have been vaporized during impact. The tsunamis were measured to have impacted the seafloor upwards of 20 kilometers away.\u00a0<\/p>\n<p>From there, a massive earthquake would have caused damage below the seabed, up to and including the liquefaction of the underlying rock across the entire area near the crater. The train of tsunamis would eventually reverse and come back as water filled the area once again.\u00a0<\/p>\n<p>In addition to all of that, scientists say that the impact would have caused ionospheric disturbances and thermal radiation. Massive landslides would&#8217;ve occurred as parts of the seafloor plateau crashed further into the ocean.\u00a0<\/p>\n<p>Fortunately for humans, these types of impacts are exceedingly rare. The largest meteor impact in living memory is the <a href=\"https:\/\/www.cnet.com\/science\/space\/its-been-10-years-since-the-biggest-meteor-impact-in-living-memory\/\" target=\"_self\" rel=\"noopener\">&#8220;super bolide&#8221; asteroid that exploded over Russia in 2013<\/a>. There is a very small chance that Bennu, a similarly sized asteroid, <a href=\"https:\/\/www.cnet.com\/science\/big-asteroid-bennu-has-1-in-1750-odds-of-smashing-into-earth-according-to-nasa\/\" target=\"_self\" rel=\"noopener\">could hit Earth sometime around the year 2300<\/a>. The odds of that happening are about one in 1,750.<\/p>\n<\/div>\n<p><script type=\"text\/plain\" class=\"optanon-category-C0004\">\n        !function(f,b,e,v,n,t,s)\n        {if(f.fbq)return;n=f.fbq=function(){n.callMethod?\n        n.callMethod.apply(n,arguments):n.queue.push(arguments)};\n        if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';\n        n.queue=[];t=b.createElement(e);t.async=!0;\n        t.src=v;s=b.getElementsByTagName(e)[0];\n        s.parentNode.insertBefore(t,s)}(window, document,'script',\n        'https:\/\/connect.facebook.net\/en_US\/fbevents.js');\n        fbq('set', 'autoConfig', false, '789754228632403');\n        fbq('init', '789754228632403');\n      <\/script><br \/>\n<br \/><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-3711241968723425\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-layout-key=\"-fb+5w+4e-db+86\"\r\n     data-ad-client=\"ca-pub-3711241968723425\"\r\n     data-ad-slot=\"7910942971\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><br \/>\n<br \/><div data-type=\"_mgwidget\" data-widget-id=\"1660802\">\r\n<\/div>\r\n<script>(function(w,q){w[q]=w[q]||[];w[q].push([\"_mgc.load\"])})(window,\"_mgq\");\r\n<\/script>\r\n<br \/>\n<br \/><a href=\"https:\/\/www.cnet.com\/science\/the-age-of-dinosaurs-ended-with-not-one-but-two-asteroids-scientists-now-say\/\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Around 66 million years ago, the dinosaurs were killed by an enormous asteroid that hit what is today Chicxulub, Mexico. But a second asteroid struck during that same era at &hellip; <a href=\"https:\/\/hotvideos24.online\/?p=121458\" class=\"more-link\">Read More<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8628],"tags":[],"class_list":["post-121458","post","type-post","status-publish","format-standard","hentry","category-science","entry"],"_links":{"self":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/121458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=121458"}],"version-history":[{"count":0,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=\/wp\/v2\/posts\/121458\/revisions"}],"wp:attachment":[{"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=121458"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=121458"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hotvideos24.online\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=121458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}