why did the dorudon go extinct

Dodo could be brought back to life with stem cell technology . Here's his caption for the figure (go to his website for full citations to the papers mentioned):. i cannot even fathom something that big. Despite this, the dodo is now universally known for being an overweight turd of a bird. The largest shark that ever lived, the prehistoricand certainly extinct megalodon, might have been driven to extinction by a smaller and nimbler competitor that still roams the seas today . Description: Dorudon ("spear-tooth") is a genus of extinct basilosaurid ancient whales that lived alongside Basilosaurus 40.4 to 33.9 million years ago in the Eocene. The dodo went extinct through a fatal combination of slow evolution and fast environmental changes, according to National Geographic (opens in new tab). Males were slightly larger than females; compared with modern wild turkeys and swans, dodos were shorter but heavier. This mass of tissue is usually called a melon organ or melon for short. In addition to reaching up to 60 feet, megalodons are thought to have weighed approximately 120,000 pounds or 60 tons. "On the fossil genus Basilosaurus, Harlan, https://en.wikipedia.org/w/index.php?title=Dorudon&oldid=1142035931, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 28 February 2023, at 04:41. -the teeth of extinct whales such as Dorudon were similar to those of extinct land mammals. This comes as a surprise asmodern-day sharks can self-regulate their body heat and adapt to their environments. The intense heat would have caused wildfires across the world, sending ash and dust into the atmosphere, causing similar effects to what the volcano theory describes. H. erectus appeared in Africa about 2 million years ago and . The origin of the name "dodo" is debatable. . Due to their inability to adapt to the imminent threats and tactfully escape, they became an easy target for explorers on excursions to the island. ThoughtCo, Aug. 25, 2020, thoughtco.com/dorudon-spear-toothed-1093198. For example, mammoths are also extinct, and scientists haven't found any living mammoth cells. Type: Prehistoric Whale Diet: Carnivore Size: 5m long. The Dodo bird went extinct due many factors. https://doi.org/10.1038/s41598-017-08536-3, Cheke, A. Alors ce mariage en Normandie est un bon dbut. The kakapo (right) is . And it wasn't just humans who consumed the dodos. it is a pleasure to hear from you formal. ", Follow Chris Ciaccia on Twitter@Chris_Ciaccia. Evidence has been found that even before human settlement, many of the birds died in flash floods . The dodo is an iconic reminder of human-caused extinction. Although they look very much like modern whales, basilosaurines and dorudontines lacked the 'melon organ' that allows their descendants to use echolocation as effectively as modern whales. However, even its taste is something people couldnt agree on. Humans killed off the giant birds by overhunting, a new study says, although the hunters did not use bows and arrows. [7][8] Kellogg placed several of the species of Zeuglodon described from Egypt in the early 20th century (including Z. osiris, Z. zitteli, Z. elliotsmithii, and Z. sensitivius) in the genus Dorudon. Medieval maps of the world featured nightmarish sea beasts haunting the periphery of the known world, ready to devour . That helps support ScienceABC with some money to maintain the site. It also makes sense that many species of mammals survived and thrived after the extinction of the dinosaurs. Scientific discovery can be unexpected and full of chance surprises. A scientist is an expert who conducts and gathers research to increase knowledge in a certain discipline. And as a result, it faded from existence. The transition from land to water is documented by a series of intermediate fossils, many of . Bob Strauss is a science writer and the author of several books, including "The Big Book of What, How and Why" and "A Field Guide to the Dinosaurs of North America.". https://doi.org/10.1080/02724634.2015.1113803, Shapiro, B., Sibthorpe, D., Rambaut, A., Austin, J., Wragg, G. M., Bininda-Emonds, O. R. P., Lee, P. L. M., & Cooper, A. Charles Q. Choi, Contributor. [7] Since then many specimens have been referred to Prozeuglodon atrox, including virtually every part of the skeleton, and it has become obvious that it is a separate genus, not a juvenile "Proto-Zeuglodon". One of the most interesting facts about Dorudon is that it may have hunted and eaten the young of Basilosaurus. The dodo is an extinct species of flightless birds native to the island of Mauritius. A few hunded years ago, map makers' drawings of sea beasts weren't that far off from the real -- and extinct -- creatures that once swam the oceans. Market data provided by Factset. Basilosaurus, sometimes known by its scientific synonym Zeuglodon, is a genus of ancient cetaceans that lived during the late Eocene, they are thought to have died out 33 million years ago . (2002). ThoughtCo. The impact theory is also still just a theory, and not proven to be fact. I do think it is very likely that the meteor caused the decline of the dinosaurs. Over long periods of time, the number of species becoming extinct can remain fairly constant, meaning that an average number of species go extinct each year, century, or millennium. Also Read: Why Do Flightless Birds Go Extinct So Often? Why did dinosaurs go extinct and not other animals?Have you ever wondered why there was mass extinction of dinosaurs? I remember learning about the crater on the Yucatan in Spanish class. Retrieved April 12, 2022, from https://mauritianarchaeology.sites.stanford.edu/history, Hume, J. P. (2006). For three of the five extinct species H. erectus, H. heidelbergensis, and H. neanderthalensis a sudden, strong change in climate occurred on the planet just before these species died out. The kakapo is now an endangered species. Answer (1 of 17): "Dragons" were dinosaurs. But enough of the Discovery Channel stuff, youre reading this to find out how this sucker went extinct. According to the NHM (opens in new tab), the dodo had a large brain and well-developed olfactory glands, indicating that contrary to its popular reputation, it was relatively intelligent and likely had a keen sense of smell. Mauritius and its neighboring islands harbored no permanent human population before the Dutch East India Company established a settlement there in the 1600s, according to the Stanford University Department of Anthropology (opens in new tab). The limited known material for D. serratus makes it difficult to compare the two species of Dorudon. This is still a debated topic and there are many other plausible theories circling around the scientific community. Like other basilosaurids, their nostrils were midway from the snout to the top of the head. Inreconstructions of recently found bones,it would appear that the dodo was actually a lot sleeker and agile than the artists of the past gave it credit for. The first documented account of the dodo was made by the sailors of the Dutch East India Company in 1601. Vous vous dites quil risque de pleuvoir le grand jour et voulez-voir ce que le rendu donne quand le temps est couvert? It's skeletal structure resembles modern whales, but retains some features . Even if scientists managed to revive dodos, the island where they once lived is a very different place nowadays. The extinction of the dinosaurs is a debate that has gone on in the field of paleontology for hundreds of years. Resource of reconstructions of prehistoric animals. Dorudon ("Spear-Tooth") is a genus of extinct basilosaurid ancient whales that lived alongside Basilosaurus 40.4to33.9 million years ago, in the Eocene. For many . Dutch sailors first spotted the dodo at the end of the 1500s, with the first recorded observations made in 1598. why did the dorudon go extinct. Scientifically known as Otodus megalodon, the largest megalodon tooth ever found was slightly more than 7 inches in length. Unknown lineage of ice age Europeans discovered in genetic study, Watch footage of 1,000 baleen whales in record-breaking feeding frenzy in Antarctica, Otherworldly 'fairy lantern' plant, presumed extinct, emerges from forest floor in Japan. The so-called 'non-avian' dinosaurs . Nature, 429(6992), 1. https://doi.org/10.1038/nature02688, International Union for Conservation of Nature. This brings us to the most widely accepted theory, the impact theory. Dorudon lived in warm seas around the world and fed on small fish and mollusks. Retrieved from https://www.thoughtco.com/dorudon-spear-toothed-1093198. 10 Terrifying Extinct Cetaceans. M2 and M3 are morphologically very similar. It looks like nothing was found at this location. "For example, one hypothesis is that O. megalodon consumed large quantities of prey in order to maintain such a high body temperature. Which means that its probably pretty safe to say that these mammals lived in oceans all around the world. What Are Asteroids And Where Do They Come From? Unlike the thylacine, also called the Tasmanian tiger (Thylacinus cynocephalus), a species whose last known individual died in captivity in 1936, dodo populations dwindled far from human observation, roughly around 1662, according to a 2004 study published in the journal Nature (opens in new tab). This has been proven by the fossils of juvenile Basilosaurus who just so happen to have Dorudon bite marks in them. The Oxford University Museum of Natural History, What did the dodo look like? Last of the moas. Cloning, the process that created Dolly the sheep in 1996 and Elizabeth Ann the black-footed ferret in 2020, creates an identical genetic copy of an individual by transplanting DNA from a living adult cell into an egg cell from which the nucleus has been removed. P3 is the second largest cheek tooth, P4 the largest; both are very similar, dominated by the central cusp. "Dorudon." Another answer to the question "why did the dodo go extinct?" are the feathers, especially those of the white . Additionally, the new arrivals exploited the island's natural resources, harming the dodos and other endemic species and plants, ultimately paving the way for the extinction of this odd bird. https://doi.org/10.1017/S0030605300020457, Dissanayake, R. (2004). What is Evolution: A REALLY SIMPLE and Brief Explanation. Well, had dodos lived in other places beyond the island of Mauritius, or had they beenmore accustomed to natural predators, theymight have found a way to fendoff the predators and eke out survival. In the intervening years, researchers have agreed that the bird was hunted out of existence, victimized by the fallacy that no amount of exploitation could endanger a creature so abundant. http://www.foxnews.com/tech/2012/05/07/dinosaurs-farted-their-way-to-extinction-british-scientists-say.html. Sinon nhsitez pas men dire plus sur votre mariage ou vos envies photographiques: elopement en Europe, engagement session Paris, anniversaire de mariage, etc, je suis tout oue! They've become a symbol of extinction caused by human actions. Highly specialized to its environment, the flightless and slow-to-reproduce species was vulnerable to the sudden introduction of predators in its once-safe island home. Can nonhuman animals drive other animals to extinction? The current taxonomic status of Dorudon is based on Uhen 2004's revision of Dorudon and detailed description of D. atrox. The research has not been peer-reviewed yet, but Shapiro was taken aback by the public and press' excited response to her unintended announcement. Scientists have found lava flows in India that provide evidence of volcanic activity greater than humans have ever seen. Mauritius is located about 700 miles (1,100 km) from Madagascar, off the southeast coast of Africa. The evolution of the whale has been long and varied. In October of this year, the journal Science published a study that claims that the extinction of the dinosaurs was caused by a massive meteor and a series of volcanic eruptions at the same time. This change may have led to the change in vegetation, killing much of the food for the herbivores. All rights reserved. (This scenario was dramatized in the BBC nature documentary Walking with Beasts, which portrayed Dorudon juveniles being gobbled up by their larger cousins). They probably persisted for a while after this date though, and scientists have used statistical analysis to estimate the actual year of extinction as 1690. By making room for new species, extinction helps drive the evolution of life. Is Mathematics An Invention Or A Discovery? Stay up to date with what you want to know. Here is the link where I learnt from. Dorudon is a prehistoric whale which lived approximately 41 to 33 million years ago during the Late Eocene Period. (Image credit: Universal History Archive/Getty Images). Family: Basilosauridae Time period: lived 40 to 34 million years ago in the Late Eocene Size: Body length of 5 metres.. A typical representative: Dorudon atrox Andrews 1906. Powered and implemented by FactSet Digital Solutions. Climes became colder for all three, drier for H. heildelbergensis and Neanderthals, and wetter for H. erectus. Legal Statement. Dodos, distant relatives of pigeons and other doves, are often referenced as an example of human-caused extinction. (n.d.). (1987). According to study, they pumped out more than 520 million tons (472 million tonnes) of methane per year, it is enough to warm the planet. Scientists believed that the meteor that must have caused this crater would have been 6 miles in diameter. Ca tombe bien car si vous tes arrivs ici cest que je me suis plante quelque part. Dodo: Raphus cucullatus. In 2022, Shapiro dropped an unexpected dodo bombshell when she acknowledged, in response to an audience question at a Royal Society webinar, that she and her colleagues had successfully sequenced the entire dodo genome. This year marks the 100th anniversary of the passenger pigeon's extinction. (2016, October 1). No, they lacked a mass of adipose tissue that would have allowed them to pick up sounds. Unabated hunting by sailors and explorers were the main reason why the dodos went extinct. One European artist in particular, 17th-century Flemish painter Roelant Savery, is largely responsible for the rotund image of the dodo that proliferated in other artwork and cartoons. I know there is plenty of science to back it up and my opinion is only based off of speculation, but the newest theory seems much more likely to be able to do such catastrophic damage! Fortunately, dodos had no natural predators. ", The abstract continues: "However, cooling of ocean temperatures during the Pliocene would have constrained the species to lower latitudes where ocean temperatures were warmer, whilst its preferred prey (e.g., whales) evolved traits to adapt to cooler temperatures of the higher latitudes. Scientists believe they may have new insights into why passenger pigeons went extinct, after analyzing DNA from the toes of birds that have been carefully preserved in museums for over a century . . Their diet was linked to the tambalcoque tree, which in the local lexicon is called the dodo tree. Legal Statement. Scientists launch project to bring back the extinct species using stem cell technology - more than 350 YEARS after it was wiped out. A new study suggests that Megalodon, the largest marine predator to ever live, may have gone extinct due to the giant shark's body temperature. all of the above. Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates. Then, about 600 years ago, they abruptly went extinct. I2, I3, and C1 are very similar, considerably larger than I1. Gibbes concluded that Dorudon were juvenile Zeuglodon and consequently withdrew his new genus. Related to the apex predator Basilosaurus, they shared many similar physical traits. -a and c are correct. Human invasion, loss of habitat, and the threat from foreign animals are the three main reasons why dodos went extinct. Dorudon Dorudon was a genus of ancient cetacean that lived alongside Basilosaurus 41 to 33 million years ago, in the Eocene. While dodos are often described as fat and lazy, with an immense appetite, its possible that this depiction was distorted by the explorersunfair perspective. These whales were about 16 feet long and weighed around 1,000 pounds - or half a ton. This family of ancient whales, which lived from 41 to 35 million years ago, includes the oversize Basilosaurus genus. Unlike modern whales with mostly similar-shaped teeth inside their mouths, Dorudon had "heterodont" teeth. They have since been shown to be a different genus with the discovery of Dorudon juveniles. Afterwards, she worked as a news assistant for PBS NewsHour, and now works as a freelancer covering anything from asteroids to zebras. Every cup of Aromas of Coorg coffee reflects our tradition, taste, expertise & quality. The Rocky Mountain locust is now considered to be extinct. Gingerich 1992 synonymized these four species and grouped them as Saghacetus osiris.[7]. It means Dorudon's teeth had different shapes and still consisted of incisors, canines, premolars, and . Lack of flight also made dodos ill-suited to surviving natural disasters. Between 1960 and 1995 an astonishing 98 percent of black rhinos were killed by poachers, either to feed the new and voracious demand for TCM or, to a lesser extent, for horns to be used as . Vous vous mariez Paris? Another widely known theoryis that a series of volcanic eruptions caused the extinction of the dinosaurs. Voici donc quelques propositions de liens pour retrouver le doux fil de ce merveilleux site: En savoir plus sur votre photographe de mariage. In fact, having spear-shaped teeth is one of Dorudon's defining features. Speaking with LiveScience, researcher Michael Griffiths, one of the authors of the paper, said that megalodons may have had body temperatures as high as 95 to 104 degrees Fahrenheit. Dorudon - a species of ancient whale.Sea Monsters, Into the Jaws of Death Dorudon was a small, early whale from the Eocene. The dodo, orRaphus cucullatusif you want to get fancy, is an extinct species of flightless bird that was native to the tiny island nation of Mauritius before it sadly died out. "When most people think about de-extinction, they're imagining cloning," Shapiro said. You should check it out. for sites to earn commissions by linking to Amazon. 2023 FOX News Network, LLC. They were about five meters (16 ft) long and were most likely carnivorous, feeding on small fish and mollusks. interesting facts about australia for kids . In order to find and replace a bird eggs DNA, researchers would have to safely and non-destructively locate the microscopic nucleus of the egg, which could be floating anywhere inside of a bulky egg yolk. As you stand on an ancient shoreline, you see several small whales in the distance, gliding along the surface of an ancient sea. Audubon. as well as other partner offers and accept our, The 3.5 Ounce Bird That Migrates About 44,000 Miles Per Year, Handling a Baby Bird Will Not Cause the Parents to Reject It, The First Known Robot was a Mechanical Bird Created in 400 BC, Canary Birds Were Named After the Island Chain, which was Possibly Named After Dogs. Egg cells then use that DNA as a blueprint to differentiate themselves into the many kinds of cells skin, organs, blood and bones the animal needs. Columbia University, What It's Like to Be a Bird: From Flying to Nesting, Eating to Singing--What Birds Are Doing, and Why (Sibley Guides). Many historical illustrations of dodos depicted them as having brownish-grey feathers, but there is no consensus amongst scientists on the actual color of the feathers. ScienceABC participates in the Amazon Mauritanian Archaeology: History. Modeling of climatic stress (defined as the indirect effects of environmental change) based on these new data found two stress peaks at ~65 and ~30 ka, the second appearing to be more prolonged . Specimen of a dodos head (Photo Credit : gnomonic/Wikimedia Commons). Finding the tiny packet of genetic material is like "looking for a white marble in a pool of milk," Ben Novak, a lead scientist with the de-extinction conservation group Revive & Restore, told Audubon magazine. Dorudon ("spear-tooth") is a genus of extinct basilosaurid ancient whales that lived alongside Basilosaurus 40.4 to 33.9 million years ago in the Eocene.. Are Basilosaurus still alive? This article looks at the whale's evolution, how it . These are not photographs, but rather, artistic recreations from the skeletons of ancient animals that roamed the earth millions of years ago. Funnily enough, despite being one of the most famous extinct animals of all time, right up there with the wooly mammoth, no one actually knows exactly what the dodo looked like. With every year that passes, science becomes more and more amazingly awesome and as a result, the idea of cloning a dodo, As an animal that was easier to hunt than potatoes, the dodo was cooked and eaten a lot. If this is true, then the typical image of the dodo we have is probably incorrect. This lack of food would again also cause many herbivores to starve, followed by the carnivores. (2) Upper premolars and molars. The Neanderthals emerged in Europe as far back as 400,000 years ago. The New Yorker. By clicking Sign up, you agree to receive marketing emails from Insider Dodos were 3 feet tall and weighed 15 to 20 kgs. The thing is, Portuguese sailors are also said to have seen the bird,decadesbefore thisin 1507. They increase the temperature by produce too much methan from their fart. The current theory suggests that they went extinct about 40,000 years ago, not long after Homo sapiens arrived on the continent . It's commonly believed that the dodo went extinct because Dutch sailors ate the beast to extinction after finding that the bird was incredibly easy to catch due to the fact it had no fear of humans, (why it didn't fear the creature many times its size is a mystery for another day). https://www.audubon.org/news/the-surprising-reason-scientists-havent-been-able-clone-bird-yet, Stanford University Department of Anthropology. Fossils have been found along the former shorelines of the Tethys Sea in present-day Egypt and Pakistan, as well as . This theory says that the extinction of the dinosaurs was brought on by the collision of a massive meteor with the earth. The lack of sunlight would kill plants and cause a cold climate that would kill dinosaurs unable to adapt and it would eliminate the food for herbivores, and then carnivores. I think the meteor and volcano combination is probably more likely. Future US, Inc. Full 7th Floor, 130 West 42nd Street, Sunlight would then be blocked from reaching the earths surface. Whales evolved from early land mammals, adapting to life in the oceans by losing their hind limbs, growing a flat tail, developing flippers, and streamlining their bodies. Lion vs Tiger: Which Would Win In A Fight? Fossils have been found in North America, Egypt as well as Pakistan the eastern part of which bordered the . Scientific Reports, 7(1). (2017). I really loved reading this blog! Why Are There 24 Hours In A Day And 60 Minutes In An Hour? Why did the dodo go extinct? Can nonhuman animals drive other animals to extinction? In fact, the resemblance is close enough that paleontologists once thought the fossils of Dorudon were actually fossils of Basilosaurus when they were younger. Sailors who stopped at the island did . One thing that Dorudon shares in common with Basilosaurus is that both of these Eocene whales lacked the ability to echolocate, since neither of them possessed a characteristic "melon organ" (a mass of soft tissues that acts as a kind of lens for sound) in their foreheads. Pigs, dogs and rats are all animals said to have developed a taste for dodo eggs; this introduction of such animals into a foreign ecosystem, combined with humans hunting and eating them, saw the delicate balance the dodo had enjoyed for so long destroyed. [15], Similar to the upper incisors, the lower incisors are simple conical teeth curved distally and aligned with the cheek teeth. He says that volcanic activity doubles in the 50,000 years following the impact of the meteor, and that the dinosaurs became extinct within this 50,000 year period. About Dorudon . The origin of the name dodo is debatable. Paleontologist Julian Pender Hume, a research associate at the Natural History Museum (NHM) in London, told Vice (opens in new tab) that the so-called taxidermied dodo on display at NHM is made of goose and swan feathers that were glued to a plaster model by a man who had never seen a dodo. Deforestation, invasive species and human habitation would make it impossible to reintroduce the dodo without major intervention. This theory was first formulated when Luis and Walter Alvarez discovered a thin layer of iridium-rich clay in Italy in 1981. It is even crazier to think that we may never know why. A famous fossilised bay in Egypt has preserved many of them, along with their babies. Also, if humans were more compassionate towards preserving this eccentric bird,rather than just feeding on them, they could have introduced them to other parts of the world where they could adapt and survive. Which group of mammals evolved around the same period of time as Dorudon? Dorudon ("spear-tooth") is a genus of extinct basilosaurid ancient whales that lived alongside Basilosaurus 40.4 to 33.9 million years ago in the Eocene.It was a small whale, with D. atrox measuring 5 metres (16 ft) long and weighing 1-2.2 metric tons (1.1-2.4 short tons).Dorudon lived in warm seas around the world and fed on small fish and mollusks. As noted in this articleby the BBC, complete skeletons for the animal are incredibly rare, one of the last was destroyed in a fire in 1755; hell, even the model in thenatural history museumis a composite of various specimens and theyre the people literally tasked with documenting and storing animal remains. Apparently, P1 is conical, smaller than the remaining premolars and lacks accessory denticles. While the impact theory is the most widely accepted theory today, the theory is a bit more complicated than a massive impact killing everything. (1) Lower incisors and canine, (2) premolars, and (3) molars, "The pattern of brain-size change in the early evolution of cetaceans", "Letter from Prof. Agassiz, addressed to Dr. Gibbes, dated Charleston, December 23, 1847", "A Descriptive Catalogue of the Tertiary Vertebrata of the Faym, Egypt", "Description of the teeth of a new fossil animal found in the Green Sand of South Carolina". This debris can stay in the atmosphere for several years. Maybe try searching? Whereas mammals produce egg cells that scientists know how to harvest and manipulate, bird egg cells are tricky. (Inside Science) -- The earliest undisputed ancestor of modern humans, Homo erectus, likely survived up to at least 117,000 years ago, before going extinct when the environment in its last refuge changed from woodland to rainforest, a new study suggests. The species is commonly thought to have gone extinct 2.6 million years ago. As the oceans cooled, the sharks may have been forced to lower latitudes where ocean temperatures were warmer, while its prey evolved to withstand cooler temperatures of higher latitudes. The megalodon may have been the largest marine predator to ever live, growing up to 60 feet with teeth nearly the size of a standard sheet of paper. By visiting our site, you agree to our privacy policy regarding cookies, tracking statistics, etc. In this article, we will learnwhat dodos were, what they looked like, wherethey lived, and why they went extinct! But that success does not guarantee the resurrection of the dodo. During the dinosaurs time, scientists believe that the planet slowly became cooler and less humid. Then, they had to sort out which recovered DNA belonged to the dodo and which belonged to fungi and bacteria that had invaded the bones as they decomposed. But when the dinosaurs brought these diseases to new areas, the inhabitants of these areas did not have immunity, and were vulnerable to being killed by these diseases. 4 Dinosaurs and Prehistoric Animals of Louisiana, Facts About the Ambulocetus Prehistoric Whale, The Dinosaurs and Prehistoric Animals of Wyoming. The three main candidates are either, the Dutch word dodoor, the Portugese word, duodo, or our personal favourite, the Dutch word, dodaarswhich roughly translates as knot-arse. Uhen 2004 placed D. atrox in the same genus as D. serratus because of similarities in size and morphology, but kept them as separate species because of differences in dental morphology. A new study may explain why Megalodon went extinct. Return PolicyPrivacy Policy, Unfortunately, your shopping cart is empty:(, the cost of the image depends on its size, you may use several options to pay for the image, such as credit cards (Visa, MasterCard and Maestro) or Bank transfer (wire transfer). Some biologists opine that they lost the ability to flydue to the absence of such predators. It stood up to 27 inches (70 centimeters) tall and weighed 28 to 45 pounds (13 to 20 kilograms), according to a 2004 study in the journal Biologist (opens in new tab). Skeletons of the extinct birds suggest to scientists how dodos may have looked when they were alive. Could We Have Prevented The Dodos Extinction?

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why did the dorudon go extinct

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