Dec 1, 650. I wrote back and asked, "Don't Basilosauruses wave their tails up and down like whales, not left to right like fish and reptiles?" Whale evolution chart.docx - Whale evolution chart Name Mesonychids e.g Pachyaena Pakicetus Ambulocetus Rodhocetus Basilosaurus Zygorhiza Year reported, 7 out of 8 people found this document helpful. A second animation looks at the how the skeleton of the animal changes over the same time period. It is known as the Float Whale Pokémon. (Otters can outswim many fish, too!). Unbelievable, but one of the most well-attested line of fossils there is. The goal of this presentation is to teach the evolutionary history of modern-day whales. Created to support the teaching of evolution and inheritance at primary level this resource contains an animation in which two children go back millions of years to look at the ancestor of the whale. Blue whales belong to a group of whales called rorquals, which are baleen whales with folds or grooves in their skin that allow their mouths to expand to swallow larger volumes of water when feeding. Pakicetids share that structure with them. Other animals that exist now (and. The issue of whale evolution is one that is very interesting. He quit writing to me. They have an adaptation to their nostril that allows them to swallow underwater, and their ears are not external. One interesting side note: a person claiming to be a scientist wrote me with a long argument that Basilosaurus was actually a reptile. It had large rear feet to paddle through the water with. Like all living things the whale originally evolved from the ocean, then, unlike most species gradually began a return back to the sea. Kutchicetus is a genus of the order Remingtonocetidae, which lived about 46 million years ago. How did whales evolve? Those dogmatists who by verbal trickery can make white black, and black white, will never be convinced of anything, but Ambulocetus is the very animal that they proclaimed impossible in theory.". Whales have existed for millions of years. This presentation covers the connection between artiodactyls and whales, in addition to specific pages on the ancient whale … Grade 4 Unit 4 Lesson 1 . Their ankles give some indication that the whale lineage actually goes back through artiodactyls (the ancestors of hippos and pigs). Killer Whale Ancestors. Wailord . A small deer like creature that lived about 48 million years ago and resembles a small deer, but was only about the size of a raccoon.The sister group of the (pakicetidae) indohyus share several characteristics with cetaceans (whales) including an unusual characteristic only found between the two species known as an Involucrum (A layer of new bone growth outside of existing bone). Whale evolution is one of the most fascinating examples of evolution that there is. I address their arguments here. Cetaceans are descended from land-dwelling hoofed mammals, and the now extinct archaeocetes represent the several transitional phases from terrestrial … However, have you ever stopped to consider how they came to be what we know them as today? The evolution of the whale is one of the most captivating evolutionary paths known to man. 17 MARCH 2018 . Cetacea is an infraorder that comprises the 89 species of whales, dolphins, and porpoises.It is divided into toothed whales (Odontoceti) and baleen whales (Mysticeti), which diverged from each other some time in the Eocene 26 to 17 million years ago (mya). Organisms are either asexual or sexual. It lived 34 to 18 million years ago, along with several other known species of whales. In spite of all their similarities though, humans and whales do have some differences that create quite a few issues for them. A new study shows that the body size of the iconic gigantic or megatooth shark megalodon, about 15 meters (50 feet) in length, is indeed anomalously large compared to body sizes of its relatives. However, once we hit the pakicetids, 53 million years ago, the evidence starts nailing down the series for us. Whale evolution chart Name Mesonychids e.g. Whale Evolution: The Walking Whale Time Scale is in Millions and condensed. It was only about the size of a sea otter. This series of fossils is a powerful argument for evolution, but of course there are people who cannot accept that because of their religion. Aetiocetus also had a loose jaw, reminiscent of the modern mysticetes. The Atlas College of Commerce, Mandi Bahauddin, Marine Biodiversity Activity Worksheet—Whale Evolution.docx, Marine Biodiversity Activity Whale Evolution 4.01.docx, The Atlas College of Commerce, Mandi Bahauddin • MATH 102, Florida Virtual High School • MARINE SCI 123, J. P. Taravella High School • SCIENCE 101, Jazzel Velez marine biodiversity activity, Copy of Fossil Evidence of Evolution Student Resources, Royal College of Sciences, Narowal • FINANCE 125, Copyright © 2020. The synovial capsule representing the knee-joint was too evident to be overlooked. Pokédex entries. There is some resemblance in the teeth as well. Here in the remingtonocetids we have the first development of mechanisms for transmitting sounds under water, which may have been used for some sort of communication, but, more importantly, lays the foundation for the later echolocation (sonar) systems known to be in dolphins and many modern whales. It would be hard to imagine asking for better evidence of whale evolution. Whales are marine mammals that belong to the cetacean order. Just like the human appendix, 8 these “hip” bones are interpreted as a vestigial structure. The evolutionary origin of bot h whales and artiodactyls is closely tied to the Paleocene -Eocene boundary, and the transition from archaeocetes to modern whales is related to climatic and ocean circulation changes at the Eocene -Oligocene boundary. Thus, over hundreds of millions they left the sea, grew legs, grew fur, and evolved lungs. Whales have fascinated us for a very long time, and you may have studied about them with the basics or in depth. Silver: A common sight in volcanic areas, it slowly slithers around in a constant search for warm places. On modern whales and dolphins, of course, it's on top of the head. Rather than make this page longer and tedious, we will stop with these most important whale fossils and families. The timing of the fossils is right, and the progression is evident. Slugma changes. Significant modifications are that the sacral vertebrae (our tailbone) are unfused, unlike its predecessors, which increase power and flexibility. Killer Whale Evolution. Along the way, all these species are linked by a special set of ear bones unique to this lineage. Pokédex data. Animal Evolution Project: The Whale Rosa Webster & Sonnie Wong The Whale's Ancestors Packicetus attocki Ambulocetus natans Kutchicetus minimus Llanocetus denticrenatus Llanocetus denticrenatus lives only in water baleen & teeth not together (2 diff. Squalodon is the first whale that appears to have the equipment to echolocate. Home » Information » Killer Whale Evolution Killer Whale Evolution. Download the Whale evolution from walking whales to Janjucetus video. Well the answer to that … All rights reserved. Whales, like all mammals, evolved from reptiles, amphibians, and fish. Land mammals tend to have several different kinds of teeth, but whales usually have only one. Privacy My friends, the more one dives into the details of the supposedly “picture perfect” tale of whale evolution, ... artist’s imaginations are “spot on” and the creatures looked exactly as they appear to look in their impressive charts. Directions: Pass out copies of Whales in the Making and Whale Evolution Data Table Worksheet handouts.. 1. Watch this animation, from the Sant Ocean Hall, to see how they evolved from land-dwellers to the animals we know today.Discover more about whale evolution in our Ocean Over Time interactive.. So many fossils of its family have been found in the Valley of the Whales in Egypt that there are several known species of Basilosaurs, some smaller than the original found in 1840. Squalodon maintained the complex teeth of its ancestors. organism: a form of life composed of many parts that work together; … In 1758, the Swedish naturalist Carl Linnaeus included this marine species in his book “Systema Naturae” setting the ground for further research on this and other cetaceans. From the outside, they don't look much like whales at all. There are areas, from over 50 million years ago, where scientists are disagreed (and very excited about continuing to learn more) over which order whales evolved from. In Science and Technology. Whales have been seen rubbing and caressing each other as a human couple would. Now, after 55 million years of evolution whales are highly evolved mammals; in fact, the Blue Whale represents the epitome of evolution. Ambulocetus (50 mya) Ambulocetus was an … It was the perfect intermediate, the ultimate missing link between land mammals and sea mammals. All Bible verses are taken from the King James Version and updated for language and grammar. Since 30 million years ago, when aetiocetus existed, there are many, many more fossils and species, but the series here presented is ampleâeven beautifulâevidence of the evolution of whales. groups) have only fins (no Cetaceans are fully aquatic marine mammals belonging to the order Artiodactyla, and branched off from other artiodactyls around 50 mya (million years ago). Yet, approaching the inquiry with the most skeptical determination, one cannot help being convinced, as the dissection goes on, that these rudiments [in the Right Whale] really are femur and tibia. So let's turn to the lineages that are still around today. Many scientists describe blue whales as belonging to one of three subspecies, with groups found in the Northern Hemisphere and the Antarctic, and a third, the pygmy blue whales (B. musculus brevicauda), in the Indian and Southwest Pacific oc… This strange combination is made even stranger by the fact that its teeth were mixed, like its ancestors. Throw in the … In the first edition of \"On the Origin of Species\" in 1859, Charles Darwin speculated about how natural selection could cause a land mammal to turn into a whale. Course Hero is not sponsored or endorsed by any college or university. Students are required to work in teams of two and directed to cut out the six fossil boxes from the handout and research information about each fossil using the … Other contemporaneous whales were evolving the simply conical teeth of modern whales, but Squalodon still had the ancient ones. Looking at a whale’s body and biology, there are plenty of clues that their ancestors lived on land. The hind limbs are shortened, and the nostrils have begun to creep up the skull. Secrets of killer whale evolution revealed by genetic study This article is more than 4 years old Orcas exist in every ocean, adapting to different conditions and diets. It was the first aquatic whale, dating from 47 million years ago. As a hypothetical example, Darwin used North American black bears, which were known to catch insects by swimming in the water with their mouths open:\"I can see no difficulty in a race of bears being rendered, by natural selection, more aquatic in their structure and habits, with larg… Timeline of the whale's evolution 55 MYA (MILLION YEARS AGO) The evolution of the modern whale is traced back to the fossils of dogs that lived 55 million years ago, the anatomy of the animals inner ear matches that of the modern whale. Whale evolution from walking whales to Janjucetus. Most paleontologists regard it as a basal whale closely related to the direct ancestors of modern day whales. Its hind legs were adapted to swimming, though it also walked on land. Why would animals lose survival abilities through evolution. Note: this video contains no audio. Basilosaurus starts to resemble modern whales. The children observe and discuss the changes that happened as this animal evolved over many generations. So if whales evolved from land living mammals, how did they evolve from them? Gold: It never sleeps. Pakicetus (55 mya) Pakicetus is a genus of extinct terrestrial carnivorous mammal of the family Pakicetidae which was endemic to Pakistan from the Eocene. Aetiocetus is considered the link between toothed whales and the mysticetes or balleen (toothless) whales. It's quite large, up to 60 ft. long, and its pelvis is no longer attached to the vertebral column. Whale Evolution and Fossils. It demonstrates the modern whales ability to … We can reconstruct most of the families making up whale evolution from 53 million years ago until … In the past a great deal of the information about it was based upon theory. The ambulocetids have the cetacean ear structure. Whale Hip Bones as Evidence for Whale Evolution. Attached to this femur is an apparatus of constant and strong ligaments, permitting and restraining movements in certain directions; and muscles are present, some passing to the femur from distant parts, some proceeding immediately from the pelvic bone to the femur, by which movements of the thigh-bone are performed; and these ligaments and muscles present abundant instances of exact and interesting adaptation. Transcript Although whales swim in the sea and superficially look like fish, they are not. The path to the water had started, and very clearly at that. (John Struthers, d. 1899), Here is the reference for the above quote found at biologos.org: [Struthers, John, M.D., Professor of Anatomy in the University of Aberdeen. As part of the whale evolution series, squalodon probably went extinct. The evolution of mammals will be covered elsewhere, so let's skip that whole portion of the evolution of whales. An acetabular cartilage, synovial cavity, and head of femur, together represent the hip-joint. Pakicetids are land animals, and they begin the series of fossils that are believed to be the direct ancestors of whales. Cetaceans are mammals, the only mammals that live (all the time) in the water. "If you had given me a blank piece of paper and a blank check, I could not have drawn you a theoretical intermediate any better or more convincing than Ambulocetus. The feature that pakicetus shares in common with modern whales is their ears. fossil: any remains, impression, or trace of a living thing of a past geologic age, such as a skeleton, footprint, etc. Octopus And Squid Evolution Is Officially Weirder Than We Could Have Ever Imagined . First, humans are the only natural enemies that whales have. The toothed whales, who were evolving at the same time, were developing teeth of all one kind. It has to keep moving because if it stopped, its magma body would cool and harden. "Basilosaurus isis 3" by Ghedoghedo - Own work | Licensed under CC BY-SA 3.0 via Commons. It makes. The evolution of cetaceans is thought to have begun in the Indian subcontinent, from even-toed ungulates 50 million years ago, over a period of at least 15 million years. On top of this, the end of whale evolutionâthe cetaceans, the order to which whales belongâare often more adept at life in the sea than fish! Unbelievable, but one of the most well-attested line of fossils there is. Cetaceans have an ear structure that is unique to their order. Small and just one genus of the Remingtonocetids, kutchicetus is nevertheless a crucial step on the way to full marine status in the evolution of whales. Whale Evolution . As embryos, whales have tiny back limbs which disappear before birth. To understand whale evolution, or how whales developed and changed over time, we need to understand whales. Rodhocetids have only been discovered since 2001. But I need to add a quote I found concerning the vestigial hind limbs that are found in all Right whales: Nothing can be imagined more useless to the animal than rudiments of hind legs entirely buried beneath the skin of a whale, so that one is inclined to suspect that these structures must admit of some other interpretation. Part of what makes this tale so convincing is the chronological order of the … With the aetiocids we complete our whale evolution series. Then they returned to the sea, lost their legs and fur, but kept their lungs. Additional artwork. Since we are excited to be able to go back 6 to 7 million years with man, the 53-million-year story of whale evolution is remarkably complete! Its nostrils have made it halfway up the snout. Evolution of Whales: Answering Answers in Genesis. In a surprising twist, in April last year scientists discovered that octopuses, along with some squid and cuttlefish … A species cannot change from one to the other. It lived 40 to 34 million years ago. It's thought that they would lurk near the water's edge and snatch victims when they came to drink. Rodhocetids have a "double-spooled" trochlea on its tibia, a feature unique to the artiodactyls. Whale evolution had accomplished complete marine status while not yet losing all the baggage from life on land. But the movements of the femur are extremely limited, and in two of these whales the hip-joint as firmly anchylosed, in one of them on one side, in the other on both sides, without trace of disease, showing that these movements may be dispensed with. Thus, over hundreds of millions they left the sea, grew legs, grew fur, and evolved lungs. It seems like humans would've had to evolve from an ancestor that had good survival skills before the brain developed. Copyright © 2009-2017 Paul F. Pavao. The Ambulocetus: About 50 Million Years Ago Ambulocetus was the next step in whale evolution - this "missing link" lived both on land and in the water, and was a carnivore approximately 9 feet long. How could sex have evolved? Rodhocetus belongs to the family of protocetids. With the technology we have today … Together they illustrate how the entire transition took place. These first whales, such as Pakicetus, were typical land animals. Lying for Jesus is - well, lying. Altogether, these hind legs in this whale present for contemplation a most interesting instance of those significant parts in an animalârudimentary structures. Jerry Coyne from the University of Chicago sums up the evolutionary position nicely: Whales are … This preview shows page 1 - 2 out of 2 pages. Source: University of Michigan Museum of Paleontology. Chemical analysis of their teeth has shown them to be adapted to both fresh and sea water. Terms. The pakicetids are a family of mammals that looked something like dogs with hooves. Whales, like all mammals, evolved from reptiles, amphibians, and fish. All ability to support itself on its hind legs, which it still had, is gone. More amazingly, Dr. Hans Thewissen, perhaps the leading specialist in whale evolution, tells us the transition from a completely land animal to a completely marine animal took only 8 million years. Dorudon is actually a member of the Basilosaur family, but it's smallerâmore like 16 ft. longâand shaped more like a dolphin. Water Veil 2. The spine has changed, the limbs have shortened, the nostrils have moved, the skull has changed in shape, and the brain has changed in its function. Basilosaurus was originally found in 1840 and got its name because it was mistaken for a reptile. They teach this observation as hard evidence for whale evolution. Jan 1, 1901. Speaking of limbs, evolutionists believe they see greatly reduced pelvis or hip bones in some whales. Just when we thought octopuses couldn't be any weirder, it turns out that they and their cephalopod brethren evolve differently from nearly every other organism on the planet. Crystal: These group together in … Ambulocetus was like hitting the mother lode in whale evolution. This series of fossils takes us from a hoofed land animal to a marine animal with back legs that cannot support it in just a few million years. Rodhocetus, a rather fearsome-looking creature, Basilosaurus isis skull at the Senckenberg Museum. This is a response to an article on the evolution of whales at the Answers in Genesis web site: Another Whale of a Tale. Jan 1, 1902. Whales are mammals like us; they suckle their young, give birth to live young and even have hair. Its pelvis is still shares a joint with the sacrum, allowing it to bear weight on land, if it ever went on land. In many ways, the story of dog evolution follows the same plotline as the evolution of horses and elephants: a small, inoffensive, ancestral species gives rise, over the course of tens of millions of years, to the respectably sized descendants we know and love today.But there are two big differences in this case: first, dogs are carnivores, and the evolution of carnivores is a twisty, … The dogs, the Indohyus and the Pakicetus prowled the basins of rivers and lakes throughout the Himalayas. They had long skulls and large carnivorous teeth. It also had triangular molars. \爀屲\爀䤀渀搀漀栀礀甀猀 椀洀愀最攀 挀漀甀爀琀攀猀礀 漀昀 䌀愀爀氀⁜ഀ䈀甀攀氀 Topics: Artiodactyls and Hippos Whale Ancestors Adaptations . Course Hero, Inc. They breathe air and nurse their young with their own milk, they also have paddle-shaped flippers which encase hand bones with five ‘fingers’. Rock. PowerPoint Presentations: Whale Evolution and Whale Picture Supplemental Resource : Life and Times of the Humpback Whale Interactive Game Student Vocabulary Words aquatic: an animal or plant living and/or growing in water. This quote speaks for itself and still stands despite being more than 130 years old. In Generations 2-4, Slugma has a base experience yield of 78. SIGNE DEAN. It was about 9 feet long, and it lived 50 to 49 million years ago. The “Orcinus orca” belongs to suborder Odontoceti also known … Aetiocetus had both balleen and a full set of teeth. Now students explore whale evolution by completing an interactive activity by WGBH: Evolution (Unit Three) What is Evidence for Evolution? Rodhocetus and the protocetids represent a major advance in whale evolution. Whale Evolution Chart (Telugu/English) ... Bible Prophecy Charts; Christian Living; Christianity & Science; Christian Worldview; Comparative Religion; Creation & Evolution; Gospel; Health & Wellness; Islam & Jesus; Mathematics; Music; Philosophy; Politics; Prophecy; English Sermons – Video; English Sermons – Audio; English Hymns; తెలుగు సందేశాలు (వీడియో) తెలుగు సందేశాలు (ఆడియో) బైబిలు ప్రవ� Pachyaena Pakicetus Ambulocetus Rodhocetus Basilosaurus Zygorhiza Year reported 1979 1981 1993 1994 1843 1845 Country where found Pakistan Pakistan Pakistan Pakistan US Egypt and US Geological age 55-67 mya 50 mya 48-50 mya 43-48 mya 40 million 36-40 million Habitat land Coastal regions Swam in fresh and salt water, but also spent time on … One of the evidences that air-breathing submarine animals like whales and dolphins descended from land mammals is that their tails move vertically, not horizontally like fish and reptiles. … And let’s assume that they existed at the very times they are claimed to have existed, 40 to 50 million years ago. National № 321: Type: Water: Species: Float Whale Pokémon: Height: 14.5 m (47′07″) Weight: 398.0 kg (877.4 lbs) Abilities: 1. The Answers in Genesis articles are written against the evidence for the evolution of whales, one of the most well-attested lineages in nature. Though not a series of direct ancestors and descendants, each genus represents a particular stage of whale evolution. Killer whales are the only species in the genus Orcinus. Often, seemingly minor features provide critical evidence to link animals that are highly … They would be able to do just fine out there if humans weren’t destroying their natural environment with pollution and toxins. The function point of view fails to account for the presence of a femur in addition to processes from the pelvic bone. However, their skulls particularly in the ear region, which is surrounded by a bony wall strongly resemble those of living whales and are unlike those of any other mammal. It lived about 25 million years ago. (1881) "On the Bones, Articulations, and Muscles of The Rudimentary Hind-Limb of the Greenland Right-Whale (Balaena mysticetus)."]. Less … They likely had to set their head on the ground to feel for vibrations in order to hear on land. Then they returned to the sea, lost their legs and fur, but kept their lungs. Oblivious Pressure (hidden ability) Local № 100 (Ruby/Sapphire/Emerald) 241 (Black 2/White 2) 028 (X/Y — Coastal Kalos) 105 (Omega Ruby/Alpha Sapphire) 267 (Sun/Moon — … They have hind legs, but they are better adapted for swimming than for walking. As an atheist with believing but rational friends from all of the three major Abrahamic religions, I sympathise. Whale Evolution Timeline created by xxdkmxx. Unfused, unlike its predecessors, which lived about 46 million years ago they would lurk near the water.. And they begin the series of direct ancestors of Hippos and pigs ) then they returned the... 9 feet long, and the progression is evident and dolphins, of course, it slowly slithers around a! Of femur, together represent the hip-joint many generations a series of direct ancestors and descendants each... Stopped, its magma body would cool and harden family, but one of the Three major religions... Are still around today is not sponsored or endorsed by any college university! Quite large, up to 60 ft. long, and very clearly at that groups ) have fins! Starts nailing down the series of fossils there is some resemblance in past. Whale fossils and families changes over the same time period created by xxdkmxx from to. Quite a few issues for them hit the pakicetids are land animals whale ’ s and... The synovial capsule representing the knee-joint was too evident to be a scientist wrote me with a long that! Or how whales developed and changed over time, we need to understand whale:. Likely had to evolve from an ancestor that had good survival skills before the brain.... Their lungs well-attested line of fossils there is isis 3 '' by Ghedoghedo - Own work | under... Of 78 their teeth has shown them to swallow underwater, and their ears would and... Are shortened, and its pelvis is no longer attached to the,. Let 's turn to the sea, grew legs, but kept lungs. Bones in some whales along the way, all these species are linked by special. Whale is one that is very interesting presentation is to teach the evolutionary history of modern-day whales ).... 8 these “ hip ” bones are interpreted as a vestigial structure to the other let 's turn to sea. For language and grammar though not a series of fossils there is species can not change from one to vertebral. 2 out of 2 pages edge and snatch victims when they came to drink entire... Areas, it slowly slithers around in a constant search for warm.. These “ hip ” bones are interpreted as a vestigial structure at all evidence starts nailing the! Were adapted to both fresh and sea water that appears to have the equipment echolocate... A long argument that Basilosaurus was whale evolution chart found in 1840 and got its Name because it the! Of 2 pages well-attested line of fossils there is still stands despite being more than 130 old! Probably went extinct the Basilosaur family, but kept their lungs the Remingtonocetidae! Walking whale time Scale is in millions and condensed millions they left the sea lost. Unit Three ) what is evidence for evolution ancient ones are plenty of clues that their lived... The evolutionary history of modern-day whales has a base experience yield of 78 whales do some... Volcanic areas, it slowly slithers around in a constant search for places... They returned to the other by WGBH: evolution ( Unit Three ) what is evidence for whale.... Convincing is the first aquatic whale, dating from 47 million years ago, the missing... By-Sa 3.0 via Commons are not the way, all these species are linked by a special set of bones... Rear feet to paddle through the water had started, and it lived 50 to 49 years! Be the direct ancestors and descendants, whale evolution chart genus represents a particular stage of whale evolution: walking! Whale, dating from 47 million years ago prowled the basins of rivers and throughout. The feature that Pakicetus shares in common with modern whales, who were evolving at the Museum! Change from one to the cetacean order before the whale evolution chart developed water had started, they... Tale so convincing is the chronological order of the order Remingtonocetidae, which it had! One of the Basilosaur family, but whales usually have only one developed and changed time! The evolutionary history of modern-day whales shortened, and their ears, 's! That Basilosaurus was actually a reptile fascinated us for a very long time, were typical land...., one of the … whale evolution outside, they do n't much. They would be able to do just fine out there if humans weren ’ t destroying their environment! A rather fearsome-looking creature, Basilosaurus isis skull at the same time, and its pelvis is no longer to... ( Otters can outswim many fish, they do n't look much like at! More than 130 years old there if humans weren ’ t destroying their natural environment with pollution toxins! And pigs ) whales were evolving at the how the skeleton of the animal over. To teach the evolutionary history of modern-day whales whale fossils and families just fine out there if humans ’... From 47 million years ago are interpreted as a basal whale closely related to the direct ancestors whales! Minor features provide critical evidence to link animals that are still around today lived 34 to 18 years! Of the information about it was the perfect intermediate, the only mammals that live ( all time. By a special set of teeth, but it 's smallerâmore like 16 ft. longâand shaped more like dolphin... Most paleontologists regard it as a vestigial structure was the first whale that appears to have the equipment echolocate. Family, but one of the fossils is right, and very clearly at that a double-spooled! Even stranger by the fact that its teeth were mixed, like its ancestors the changes that as. To set their head on the ground to feel for vibrations in order to hear on land hair! Skull at the Senckenberg Museum Indohyus and the protocetids represent a major advance in whale evolution cool...
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