www.nationalgeographic.com
Open in
urlscan Pro
18.173.187.38
Public Scan
Submitted URL: https://qr30.myeblox.com/
Effective URL: https://www.nationalgeographic.com/science/article/dinosaur-extinction
Submission Tags: phishingrod
Submission: On January 16 via api from DE — Scanned from DE
Effective URL: https://www.nationalgeographic.com/science/article/dinosaur-extinction
Submission Tags: phishingrod
Submission: On January 16 via api from DE — Scanned from DE
Form analysis
0 forms found in the DOMText Content
Skip to content * Login * * Newsletters * Subscribe * Menu > mexico A small coelurosaur, a feather-tailed dinosaur that lived 99 million years ago, approaches a resin-coated branch on the forest floor in an illustration. Chung-tat Cheung Please be respectful of copyright. Unauthorized use is prohibited. * Science * Explainer WHY DID THE DINOSAURS GO EXTINCT? Learn about the mass extinction event 66 million years ago and the evidence for what ended the age of the dinosaurs. ByVictoria Jaggard Published July 31, 2019 • 6 min read ShareTweetEmail Abundant fossil bones, teeth, trackways, and other hard evidence have revealed that Earth was the domain of the dinosaurs for at least 230 million years. But so far, not a single trace of dinosaur remains has been found in rocks younger than about 66 million years. At that point, as the Cretaceous period yielded to the Paleogene, it seems that all nonavian dinosaurs suddenly ceased to exist. Along with them went fearsome marine reptiles such as the mosasaurs, ichthyosaurs, and plesiosaurs, as well as all the flying reptiles known as pterosaurs. Ancient forests seem to have flamed out across much of the planet. And while some mammals, birds, small reptiles, fish, and amphibians survived, diversity among the remaining life-forms dropped precipitously. In total, this mass extinction event claimed three quarters of life on Earth. 3:32 Dinosaurs 101 Over a thousand dinosaur species once roamed the Earth. Learn which ones were the largest and the smallest, what dinosaurs ate and how they behaved, as well as surprising facts about their extinction. Piecing together what happened has been a massive effort for paleontologists, and theories for what killed the dinosaurs and the rest of the planet’s Cretaceous inhabitants have ranged from the plausible to the downright zany. For now, two leading ideas are battling it out within the scientific community: Were dinosaurs victims of interplanetary violence, or more Earthly woes? DEATH FROM ABOVE One of the most well-known theories for the death of the dinosaurs is the Alvarez hypothesis, named after the father-and-son duo Luis and Walter Alvarez. In 1980, these two scientists proposed the notion that a meteor the size of a mountain slammed into Earth 66 million years ago, filling the atmosphere with gas, dust, and debris that drastically altered the climate. Their key piece of evidence is an oddly high amount of the metal iridium in what’s known as the Cretaceous-Paleogene, or K-Pg, layer—the geologic boundary zone that seems to cap any known rock layers containing dinosaur fossils. Iridium is relatively rare in Earth's crust but is more abundant in stony meteorites, which led the Alvarezs to conclude that the mass extinction was caused by an extraterrestrial object. The theory gained even more steam when scientists were able to link the extinction event to a huge impact crater along the coast of Mexico’s Yucatán Peninsula. At about 93 miles wide, the Chicxulub crater seems to be the right size and age to account for the dino die-off. In 2016, scientists drilled a rock core inside the underwater part of Chicxulub, pulling up a sample stretching deep beneath the seabed. This rare peek inside the guts of the crater showed that the impact would have been powerful enough to send deadly amounts of vaporized rock and gases into the atmosphere, and that the effects would have persisted for years. And in 2019, paleontologists digging in North Dakota found a treasure trove of fossils extremely close to the K-Pg boundary, essentially capturing the remains of an entire ecosystem that existed shortly before the mass extinction. Tellingly, the fossil-bearing layers contain loads of tiny glass bits called tektites—likely blobs of melted rock kicked up by the impact that solidified in the atmosphere and then rained down over Earth. VOLCANIC FURY However, other scientists maintain that the evidence for a massive meteor impact event is inconclusive, and that the more likely culprit may be Earth itself. Ancient lava flows in India known as the Deccan Traps also seem to match nicely in time with the end of the Cretaceous, with massive outpourings of lava spewing forth between 60 and 65 million years ago. Today, the resulting volcanic rock covers nearly 200,000 square miles in layers that are in places more than 6,000 feet thick. Such a vast eruptive event would have choked the skies with carbon dioxide and other gases that would have dramatically changed Earth’s climate. Proponents of this theory point to multiple clues that suggest volcanism is a better fit. For one, some studies show that Earth’s temperature was changing even before the proposed impact event. Other research has found evidence for mass die-offs much earlier than 66 million years ago, with some signs that dinosaurs in particular were already in a slow decline in the late Cretaceous. What’s more, volcanic activity is frequent on this planet and is a plausible culprit for other ancient extinctions, while giant meteor strikes are much more rare. This all makes sense, supporters say, if ongoing volcanic eruptions were the root cause of the world-wide K-Pg extinctions. WHY NOT BOTH? Increasingly, scientists trying to unravel this prehistoric mystery are seeing room for a combination of these ideas. It’s possible the dinosaurs were the unlucky recipients of a geologic one-two punch, with volcanism weakening ecosystems enough to make them vulnerable to an incoming meteor. RELATED: PHOTOS SHOW THE MYSTERY AND BEAUTY OF FOSSILS Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. Please be respectful of copyright. Unauthorized use is prohibited. 1 / 23 1 / 23 <p>This nearly whole, deep-black skull belongs to the most complete specimen of <i>Tyrannosaurus rex</i> on display in Europe, an individual nicknamed Tristan Otto. With 170 of its 300-odd bones preserved, this scientifically important but privately owned skeleton is currently at the Museum für Naturkunde in Berlin, Germany. Discovered in 2010 in Montana’s famed Hell Creek Formation of the late Cretaceous, the 40-foot-long fossil took four years to excavate and prepare.</p> This nearly whole, deep-black skull belongs to the most complete specimen of Tyrannosaurus rex on display in Europe, an individual nicknamed Tristan Otto. With 170 of its 300-odd bones preserved, this scientifically important but privately owned skeleton is currently a... Show moreShow more Photography by Gerd Ludwig But that notion depends a lot on more precise dating of the Deccan Traps and the Chicxulub crater. In 2019, two independent studies looked at geochemical clues from Deccan Traps lava and came to slightly different conclusions, with one paper suggesting the volcanoes played a supporting role in the dinosaurs’ demise by causing pre-impact declines, and the other saying the eruptions came after the impact event and may have played only a small role in ushering along their end. This debate may rage for years, as scientists dig up new clues and develop new techniques for understanding the past. But whether space invaders or loads of lava are to blame, it’s clear that scientists studying the dinosaurs’ last gasp are revealing vital lessons about the effects of dramatic climate change on Earth’s inhabitants. ShareTweetEmail -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- READ THIS NEXT A second asteroid may have struck during the dinosaurs' demise * Science A SECOND ASTEROID MAY HAVE STRUCK DURING THE DINOSA… A possible crater buried under the West African coast may have come from a space rock that crashed into Earth around the time of the cataclysmic Chic… Rare fossils reveal stunning scene from dinosaur's last days * Science RARE FOSSILS REVEAL STUNNING SCENE FROM DINOSAUR'S LAST DAYS A herd of hadrosaurs. A tiny Cretaceous mammal. The tooth of a predator. An “exceptional” fossil site in South America is giving scientists a new window into the end of the dinosaur age. New clues reveal the devastation the day the dinosaurs died * Science NEW CLUES REVEAL THE DEVASTATION THE DAY THE DINOSAURS DIED Unusual traces found in Texas show what happened when the Chicxulub asteroid vaporized a thick bed of rock, unleashing superheated gas that kicked off a calamitous period of climate changes. A dinosaur ‘belly button’? This fossil reveals that—and more * Science * Breakthroughs A DINOSAUR ‘BELLY BUTTON’? THIS FOSSIL REVEALS THAT—AND MORE This dog-size dinosaur called Psittacosaurus is stunningly well-preserved and has revolutionized paleontologists’ understanding of dinosaur skin. GO FURTHER ANIMALS * Males evolve better weapons, females have bigger brains * Animals Males evolve better weapons, females have bigger brains * Everything you think you know about spiders is wrong * Animals Everything you think you know about spiders is wrong * Sharks are still being killed at high rates—despite bans on finning * Animals * Wildlife Watch Sharks are still being killed at high rates—despite bans on finning * How much does your name influence your future? * Science How much does your name influence your future? * Snail mucus is a skin care phenomenon—but does it really work? * Animals Snail mucus is a skin care phenomenon—but does it really work? * Africa's vultures are disappearing. Disaster could follow. * Animals Africa's vultures are disappearing. Disaster could follow. ENVIRONMENT * Lithium batteries power your world. Here's how they work. * Environment Lithium batteries power your world. Here's how they work. * These caves mean death for Himalayan glaciers * Environment These caves mean death for Himalayan glaciers * 2023 was our hottest year yet. What other milestones did we reach? * Environment * 2023 in Review 2023 was our hottest year yet. What other milestones did we reach? * Japan spent decades making itself earthquake resilient. Here's how. * Environment Japan spent decades making itself earthquake resilient. Here's how. * The fungus in 'The Last of Us' is real—and it's expensive * Environment The fungus in 'The Last of Us' is real—and it's expensive * 10 simple ways to change your life in 2024 * Environment 10 simple ways to change your life in 2024 HISTORY & CULTURE * When MLK met Malcom X—the story behind an iconic image * History & Culture * Race in America When MLK met Malcom X—the story behind an iconic image * Here’s the difference between a caucus and a primary election * History & Culture Here’s the difference between a caucus and a primary election * Why the 'Gate of Grief' is making headlines * History & Culture Why the 'Gate of Grief' is making headlines * How did Rasputin really die? * History Magazine How did Rasputin really die? * The unexpected history of Irish Claddagh rings * History & Culture The unexpected history of Irish Claddagh rings * The harrowing true story behind the ‘Society of the Snow’ * History & Culture The harrowing true story behind the ‘Society of the Snow’ SCIENCE * We finally know the cause of severe morning sickness * Science * Mind, Body, Wonder We finally know the cause of severe morning sickness * Science shows organization improves mental health * Science * Mind, Body, Wonder Science shows organization improves mental health * What is causing these massive, mysterious explosions in space? * Science What is causing these massive, mysterious explosions in space? * This 10-foot ape was the largest primate ever * Science This 10-foot ape was the largest primate ever * Does trusting your doctor’s gut feeling lead to better care? * Science * Mind, Body, Wonder Does trusting your doctor’s gut feeling lead to better care? * Is there a 9th planet out there? We may soon find out. * Science Is there a 9th planet out there? We may soon find out. TRAVEL * Photo story: a pilgrimage to the rock-hewn temples of Hampi * Travel Photo story: a pilgrimage to the rock-hewn temples of Hampi * Is this New Zealand's greatest walk? * Travel Is this New Zealand's greatest walk? * Is the cruise industry ready for the rise in solo travel? * Travel Is the cruise industry ready for the rise in solo travel? * How to plan the ultimate Italian ski trip * Paid Content How to plan the ultimate Italian ski trip * The drive of design * Paid Content The drive of design * These are the beers every pub should be serving * Travel These are the beers every pub should be serving THE BEST OF NATIONAL GEOGRAPHIC DELIVERED TO YOUR INBOX Sign up for more inspiring photos, stories, and special offers from National Geographic. Sign Up LEGAL * Terms of Use * Privacy Policy * Interest-Based Ads * EU Privacy Rights * Cookie Policy * Manage Privacy Preferences OUR SITES * Nat Geo Home * Attend a Live Event * Book a Trip * Buy Maps * Inspire Your Kids * Shop Nat Geo * Visit the D.C. Museum * Watch TV * Learn About Our Impact * Support Our Mission * Masthead * Press Room * Advertise With Us JOIN US * Subscribe * Customer Service * Renew Subscription * Manage Your Subscription * Work at Nat Geo * Sign Up for Our Newsletters * Contribute to Protect the Planet FOLLOW US National Geographic InstagramNational Geographic FacebookNational Geographic TwitterNational Geographic YoutubeNational Geographic LinkedinNational Geographic TiktokNational Geographic Reddit United States (Change) -------------------------------------------------------------------------------- Copyright © 1996-2015 National Geographic SocietyCopyright © 2015-2024 National Geographic Partners, LLC. All rights reserved YOUR PRIVACY SETTINGS We and our partners store and/or access information on a device, such as unique IDs in cookies to process personal data. We work with 785 partners. You may accept or manage your choices by clicking below, including your right to object where legitimate interest is used, or at any time through the “Manage Privacy Preferences” link on each page. These choices will be signaled to our partners and will not affect browsing data. For additional information, please visit our Cookie Policy. WE AND OUR PARTNERS PROCESS DATA TO: Store and/or access information on a device. Precise geolocation data, and identification through device scanning. Personalised advertising and content, advertising and content measurement, audience research and services development. List of Partners (vendors) I Accept Show Purposes Continue without Accepting PRIVACY PREFERENCE CENTER We process your data to deliver content or advertisements and measure the delivery of such content or advertisements to extract insights about our website. We share this information with our partners on the basis of consent and legitimate interest. You may exercise your right to consent or object to a legitimate interest, based on a specific purpose below or at a partner level in the link under each purpose. These choices will be signaled to our vendors participating in the Transparency and Consent Framework. More information Allow All MANAGE CONSENT PREFERENCES TECHNICALLY NECESSARY Always Active These cookies are necessary for our services to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in, accessing, searching, or discovering content, or filling in forms. You can set your browser to block, or alert you about, these cookies, but some parts of the site will not then work. PERFORMANCE & ANALYTICS Always Active These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. FUNCTIONAL Always Active These cookies are used by us to detect or remember choices you make to customise your experience, such as language, location or other settings. Disabling these cookies may impact performance. TARGETING & ADVERTISING COOKIES Always Active These cookies may be set through our site by us and/or by our advertising partners. They may be used to build a profile of your interests and show you relevant advertising on this and on other sites. They may not store directly personal information, but instead may be based on uniquely identifying your browser and internet device. You can choose to allow these cookies or to opt out at any time. SOCIAL MEDIA COOKIES Always Active These cookies are set by a range of social media services that we have added to the site to enable you to share our content with your friends and networks. They are capable of tracking your browser across other sites and building up a profile of your interests. This may impact the content and messages you see on other websites you visit. If you do not allow these cookies you may not be able to use or see these sharing tools. STORE AND/OR ACCESS INFORMATION ON A DEVICE 644 PARTNERS CAN USE THIS PURPOSE Store and/or access information on a device Cookies, device or similar online identifiers (e.g. login-based identifiers, randomly assigned identifiers, network based identifiers) together with other information (e.g. browser type and information, language, screen size, supported technologies etc.) can be stored or read on your device to recognise it each time it connects to an app or to a website, for one or several of the purposes presented here. List of Partners (vendors) | View Illustrations PRECISE GEOLOCATION DATA, AND IDENTIFICATION THROUGH DEVICE SCANNING 309 PARTNERS CAN USE THIS PURPOSE Precise geolocation data, and identification through device scanning * USE PRECISE GEOLOCATION DATA 255 PARTNERS CAN USE THIS PURPOSE Switch Label With your acceptance, your precise location (within a radius of less than 500 metres) may be used in support of the purposes explained in this notice. * ACTIVELY SCAN DEVICE CHARACTERISTICS FOR IDENTIFICATION 119 PARTNERS CAN USE THIS PURPOSE Switch Label With your acceptance, certain characteristics specific to your device might be requested and used to distinguish it from other devices (such as the installed fonts or plugins, the resolution of your screen) in support of the purposes explained in this notice. List of Partners (vendors) PERSONALISED ADVERTISING AND CONTENT, ADVERTISING AND CONTENT MEASUREMENT, AUDIENCE RESEARCH AND SERVICES DEVELOPMENT 754 PARTNERS CAN USE THIS PURPOSE Personalised advertising and content, advertising and content measurement, audience research and services development * USE LIMITED DATA TO SELECT ADVERTISING 581 PARTNERS CAN USE THIS PURPOSE Switch Label Advertising presented to you on this service can be based on limited data, such as the website or app you are using, your non-precise location, your device type or which content you are (or have been) interacting with (for example, to limit the number of times an ad is presented to you). View Illustrations Object to Legitimate Interests Remove Objection * CREATE PROFILES FOR PERSONALISED ADVERTISING 480 PARTNERS CAN USE THIS PURPOSE Switch Label Information about your activity on this service (such as forms you submit, content you look at) can be stored and combined with other information about you (for example, information from your previous activity on this service and other websites or apps) or similar users. This is then used to build or improve a profile about you (that might include possible interests and personal aspects). Your profile can be used (also later) to present advertising that appears more relevant based on your possible interests by this and other entities. View Illustrations * USE PROFILES TO SELECT PERSONALISED ADVERTISING 475 PARTNERS CAN USE THIS PURPOSE Switch Label Advertising presented to you on this service can be based on your advertising profiles, which can reflect your activity on this service or other websites or apps (like the forms you submit, content you look at), possible interests and personal aspects. View Illustrations * CREATE PROFILES TO PERSONALISE CONTENT 218 PARTNERS CAN USE THIS PURPOSE Switch Label Information about your activity on this service (for instance, forms you submit, non-advertising content you look at) can be stored and combined with other information about you (such as your previous activity on this service or other websites or apps) or similar users. This is then used to build or improve a profile about you (which might for example include possible interests and personal aspects). Your profile can be used (also later) to present content that appears more relevant based on your possible interests, such as by adapting the order in which content is shown to you, so that it is even easier for you to find content that matches your interests. View Illustrations * USE PROFILES TO SELECT PERSONALISED CONTENT 192 PARTNERS CAN USE THIS PURPOSE Switch Label Content presented to you on this service can be based on your content personalisation profiles, which can reflect your activity on this or other services (for instance, the forms you submit, content you look at), possible interests and personal aspects, such as by adapting the order in which content is shown to you, so that it is even easier for you to find (non-advertising) content that matches your interests. View Illustrations * MEASURE ADVERTISING PERFORMANCE 675 PARTNERS CAN USE THIS PURPOSE Switch Label Information regarding which advertising is presented to you and how you interact with it can be used to determine how well an advert has worked for you or other users and whether the goals of the advertising were reached. For instance, whether you saw an ad, whether you clicked on it, whether it led you to buy a product or visit a website, etc. This is very helpful to understand the relevance of advertising campaigns. View Illustrations Object to Legitimate Interests Remove Objection * MEASURE CONTENT PERFORMANCE 347 PARTNERS CAN USE THIS PURPOSE Switch Label Information regarding which content is presented to you and how you interact with it can be used to determine whether the (non-advertising) content e.g. reached its intended audience and matched your interests. For instance, whether you read an article, watch a video, listen to a podcast or look at a product description, how long you spent on this service and the web pages you visit etc. This is very helpful to understand the relevance of (non-advertising) content that is shown to you. View Illustrations Object to Legitimate Interests Remove Objection * UNDERSTAND AUDIENCES THROUGH STATISTICS OR COMBINATIONS OF DATA FROM DIFFERENT SOURCES 422 PARTNERS CAN USE THIS PURPOSE Switch Label Reports can be generated based on the combination of data sets (like user profiles, statistics, market research, analytics data) regarding your interactions and those of other users with advertising or (non-advertising) content to identify common characteristics (for instance, to determine which target audiences are more receptive to an ad campaign or to certain contents). View Illustrations Object to Legitimate Interests Remove Objection * DEVELOP AND IMPROVE SERVICES 513 PARTNERS CAN USE THIS PURPOSE Switch Label Information about your activity on this service, such as your interaction with ads or content, can be very helpful to improve products and services and to build new products and services based on user interactions, the type of audience, etc. This specific purpose does not include the development or improvement of user profiles and identifiers. View Illustrations Object to Legitimate Interests Remove Objection * USE LIMITED DATA TO SELECT CONTENT 111 PARTNERS CAN USE THIS PURPOSE Switch Label Content presented to you on this service can be based on limited data, such as the website or app you are using, your non-precise location, your device type, or which content you are (or have been) interacting with (for example, to limit the number of times a video or an article is presented to you). View Illustrations Object to Legitimate Interests Remove Objection List of Partners (vendors) SPECIAL PURPOSES & FEATURES Always Active * ENSURE SECURITY, PREVENT AND DETECT FRAUD, AND FIX ERRORS 487 PARTNERS CAN USE THIS PURPOSE Switch Label label Your data can be used to monitor for and prevent unusual and possibly fraudulent activity (for example, regarding advertising, ad clicks by bots), and ensure systems and processes work properly and securely. It can also be used to correct any problems you, the publisher or the advertiser may encounter in the delivery of content and ads and in your interaction with them. View Illustrations * DELIVER AND PRESENT ADVERTISING AND CONTENT 477 PARTNERS CAN USE THIS PURPOSE Switch Label label Certain information (like an IP address or device capabilities) is used to ensure the technical compatibility of the content or advertising, and to facilitate the transmission of the content or ad to your device. View Illustrations * MATCH AND COMBINE DATA FROM OTHER DATA SOURCES 332 PARTNERS CAN USE THIS PURPOSE Switch Label label Information about your activity on this service may be matched and combined with other information relating to you and originating from various sources (for instance your activity on a separate online service, your use of a loyalty card in-store, or your answers to a survey), in support of the purposes explained in this notice. * LINK DIFFERENT DEVICES 316 PARTNERS CAN USE THIS PURPOSE Switch Label label In support of the purposes explained in this notice, your device might be considered as likely linked to other devices that belong to you or your household (for instance because you are logged in to the same service on both your phone and your computer, or because you may use the same Internet connection on both devices). * IDENTIFY DEVICES BASED ON INFORMATION TRANSMITTED AUTOMATICALLY 455 PARTNERS CAN USE THIS PURPOSE Switch Label label Your device might be distinguished from other devices based on information it automatically sends when accessing the Internet (for instance, the IP address of your Internet connection or the type of browser you are using) in support of the purposes exposed in this notice. List of Partners (vendors) Back Button COOKIE LIST Search Icon Filter Icon Clear checkbox label label Apply Cancel Consent Leg.Interest checkbox label label checkbox label label checkbox label label Reject All Confirm My Choices