2024 Time period of mesozoic era

The Mesozoic Era is literally the era of “middle life.”. It is also known as the age of dinosaurs. It lasted from 245 to 65 million years ago and is divided into the three periods described in Figure below. The Mesozoic began with the supercontinent Pangaea. Then, during the era, Pangaea broke up and the continents drifted apart. . Twa training

The Mesozoic Era occurred between 252 million years ago and 66 million years ago, and it was a time period that was preceded and followed by a pair of major extinctions.Dec 3, 2021 · Jurassic: Lasting from about 200 million to 145.5 million years ago, it’s the middle period of the Mesozoic Era. This was a time when dinosaurs were the dominant form of life on land. This was a time when dinosaurs were the dominant form of life on land. Reptile - Evolution, Paleontology, Adaptation: The first land vertebrates, the Tetrapoda, appeared near the middle of the Devonian Period. The earliest known reptiles, Hylonomus and Paleothyris, date from the Late Carboniferous. The Mesozoic Era is known as the “Age of Reptiles.” Today's reptiles represent only a fraction of the reptile groups and species that have lived.28 Tem 2022 ... The Mesozoic era featured apex marine predators like the Mosasaurs and Ichthyosaurs. Flowering plants also evolved during this period. The era ...Oct 15, 2023 · Jurassic Period, second of three periods of the Mesozoic Era. Extending from 201.3 million to 145 million years ago, the Jurassic was a time of global change in the continents, oceanographic patterns, and biological systems. On land, dinosaurs and flying pterosaurs dominated, and birds made their first appearance. The Cretaceous ( IPA: / krɪˈteɪʃəs / krih-TAY-shəs) [2] is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ... Tough question! Quiet Time Can Just Tease People Particularly Men Dodging Spouses Ordering Chores (Reverse). To memorize the Epochs of Cenozoic Era: Paleocene, Eocene, Oligocene, Miocene, Pliocene, Pleistocene, Holocene (or Recent): Pretty Eager Old Men Play Poker Hard. Pigeon Egg Omelets Make People Puke Heartily. Put Eggs On My …Jan 3, 2022 · The final period of the Mesozoic era, the Cretaceous period, which happened about 145 to 65 million years ago, saw the largest and the most diverse range of dinosaurs. Some of the most heaviest and brutal dinosaurs, like the Tyrannosaurus rex, lived in the Cretaceous period. The end of the Mesozoic era was marked by the mass extinction, wiping ... The topic of this week's lecture is the Mesozoic geologic history of the Pacific Northwest. The Mesozoic era began 252 million years ago, following the assembly of the supercontinent Pangaea and the greatest mass extinction the world has ever known. That set the stage for the beginning of the Triassic period, the first period of the Mesozoic era.During the Mesozoic, or "Middle Life" era, life diversified rapidly and giant reptiles, dinosaurs and other monstrous beasts roamed the Earth. The period, which spans from about 252 million...Series: Geologic Time Periods in the Mesozoic Era. The Mesozoic Era (251.9 to 66 million years ago) was the "Age of Reptiles." During the Mesozoic, Pangaea began separating into the modern continents, and the modern Rocky Mountains rose. Dinosaurs, crocodiles, and pterosaurs ruled the land and air. As climate changed and rapid plate tectonics ... The period, which spans from about 252 million years ago to about 66 million years ago, was also known as the age of reptiles or the age of dinosaurs. Boundaries English geologist John Phillips,...21.4 Western Canada during the Mesozoic. The Mesozoic extends over 187 million years from the beginning of the Triassic (252 Ma) to the end of the Cretaceous (65 Ma). It was a particularly important period for the geology of western Canada. During this time, several continental collisions occurred along the west coast, resulting in the ...The Quaternary period is subdivided into the Pleistocene and Holocene epochs. The Holocene epoch began about 11,700 years ago. If the Mesozoic era was the Age of Reptiles, the Cenozoic era is the Age of Mammals. The Paleogene period saw the development and spread of early forms of many animals, including horses, sheep, and cattle.Spanning around 200 million years, the Mesozoic Era was characterized by rapid evolution of life on the Earth, most noteworthy being the rise and fall of the dinosaurs. In the plant kingdom, the flowering plants appeared for the first time. Read this ScienceStruck article to know more about various characteristics of this era, like the plants, animals, climatic conditions, and major events.Late Palaeozoic to early Mesozoic eras Triassic. During the Triassic Period, a hot and dry environment led to the deposition of sandstones, salts and mudstones in deserts, rivers and shallow lakes. ... (in decreasing time intervals): eon; era; period; epoch; age; chron . Subdivisions are termed ‘early’, ‘mid’ or ‘late’. ...The Permian Extinction. After the Permian Extinction wiped out over 95% of …The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth's history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years). It chronologically organises strata, and subsequently time, by observing fundamental changes in stratigraphy that correspond to major geological or paleontological ... Cenozoic era. In geologic time, the Cenozoic Era, the third era in the Phanerozoic Eon, follows the Mesozoic Era and spans the time between roughly 65 million years ago (mya) and present day. On the geologic time scale, Earth is currently in the Cenozoic Era of the Phanerozoic Eon. The Cenozoic Era contains two geologic time …In the older literature, the term Phanerozoic is generally used as a label for the time period of interest to paleontologists. The term seems to be falling into disuse in more modern literature with greater emphasis being placed on the eon's three basic divisions, the Paleozoic era, the Mesozoic era, and the Cenozoic era.Oct 18, 2023 · Cretaceous Period, in geologic time, the last of the three periods of the Mesozoic Era. The Cretaceous began 145.0 million years ago and ended 66 million years ago; it followed the Jurassic Period and was succeeded by the Paleogene Period (the first of the two periods into which the Tertiary Period was divided). paleontological information in the era of big data, Best Practices serve to outline detailed and/or novel methodologies, and Rapid ... archosaurs that have evolved through the Mesozoic and Ceno-zoic, aetosaurs are some of the most bizarre and least under- ... extended period of time, with strong intraspeciﬁc variation in growth rates. The ...Allosaurus, Jurassic Central period of the Mesozoic era, lasting from 213 to 144 million years ago. In this period there were saurischian and ornithischian dinos… Paleozoic Era, In geologic time , the Paleozoic Era, the first era in the Phanerozoic Eon , covers the time between roughly 544 million years ago (mya) and until 24…The Precambrian is the name given to the span of time prior to the Cambrian. The Precambrian period accounts for 88 per cent of geological time. There are very varied deposits from the Neoproterozoic, including volcanic sequences, sedimentary rocks formed in environments from deep water to terrestrial, plutonic igneous rocks and metamorphic rocks. Australia over time submenu. Back; Australia over time; Overview Megafauna What are fossils? ... The Mesozoic era Close Navigation. Science of life submenu. Back; Science of life; ... Museum with a diverse array of presentations and events designed to give you a richer understanding of this fascinating period. 25 November 2023 - 20 March 2024 ...Delivery time is estimated using our proprietary method which is based on the buyer's proximity to the item location, the shipping service selected, the seller's shipping history, and other factors. ... (we're talking Mesozoic Era) is new again in Robert Sabuda and Matthew Reinhart's knockout new pop-up book ENCYCLOPEDIA PREHISTORICA: …The Mesozoic Era is literally the era of “middle life.”. It is also known as the age of dinosaurs. It lasted from 245 to 65 million years ago and is divided into the three periods described in Figure below. The Mesozoic began with the supercontinent Pangaea. Then, during the era, Pangaea broke up and the continents drifted apart. The Mesozoic (from the Greek prefix meso meaning “between” and zoon, animal or "living being") era is an interval of about 186 million years defined on the geologic timescale as spanning roughly from 251 to 65 million years ago (mya), and as being the second of three eras of the Phanerozoic eon. The Mesozoic era lies between the earlier ...Eon, Cambrian, Paleogene, 56 Ma, Mesozoic, 23 Ma,, 4.6 Ga, ... era, era, period and epoch are already written in the geologic time scale. Remember that the age or time in each supereons, eons, era, era, period and epoch vary depending on a reference used. Related Q&A. Q . Question 2 For a gear having an outside diameter of 3.000 in., full-depth ...Aug 29, 2019 · The final time period on the Geologic Time Scale is the Cenozoic Period. With large dinosaurs now extinct, smaller mammals that had survived were able to grow and become dominant. The climate changed drastically over a relatively short period of time, becoming much cooler and drier than during the Mesozoic Era. The Quaternary period is subdivided into the Pleistocene and Holocene epochs. The Holocene epoch began about 11,700 years ago. If the Mesozoic era was the Age of Reptiles, the Cenozoic era is the Age of Mammals. The Paleogene period saw the development and spread of early forms of many animals, including horses, sheep, and cattle.By Youth and Education in Science Mesozoic (252-66 million years ago) means 'middle life' and this is the time of the dinosaurs. This era includes the Triassic, Jurassic, and Cretaceous Periods, names that may be familiar to you.Spanning around 200 million years, the Mesozoic Era was characterized by rapid evolution of life on the Earth, most noteworthy being the rise and fall of the dinosaurs. In the plant kingdom, the flowering plants appeared for the first time. Read this ScienceStruck article to know more about various characteristics of this era, like the plants, animals, climatic conditions, and major events.The Mesozoic Era began 252.2 million years ago, following the conclusion of the Paleozoic Era, and ended 66 million years ago, at the dawn of the Cenozoic Era.Jun 11, 2018 · Mesozoic The middle of three eras that constitute the Phanerozoic period of time, about 248–65 Ma ago. The Mesozoic (literally ‘middle life’) was preceded by the Palaeozoic Era and followed by the Cenozoic Era. The Mesozoic comprises the Triassic, Jurassic, and Cretaceous Periods. The first period of the Cenozoic Era is called the Tertiary Period, which began around 65 million years and ended around 2.6 million years ago. The Tertiary Period contains two subperiods: the ...Figure 27.4.1 27.4. 1: (a) Earth’s history is divided into eons, eras, and periods. Note that the Ediacaran period starts in the Proterozoic eon and ends in the Cambrian period of the Phanerozoic eon. (b) Stages on the geological time scale are represented as a spiral. (credit: modification of work by USGS)1 Tem 2022 ... “Dinosaurs were there during the Triassic under the radar all the time ... periods/Mesozoic era/Triassic period; /Physical sciences/Earth ...The Paleozoic Era is literally the era of “old life.”. It lasted from 544 to 245 million years ago and is divided into six periods. Major events in each period of the Paleozoic Era are described in Figure below. The era began with a spectacular burst of new life. This is called the Cambrian explosion. Eon, Cambrian, Paleogene, 56 Ma, Mesozoic, 23 Ma,, 4.6 Ga, ... era, era, period and epoch are already written in the geologic time scale. Remember that the age or time in each supereons, eons, era, era, period and epoch vary depending on a reference used. Related Q&A. Q . Question 2 For a gear having an outside diameter of 3.000 in., full-depth ...Stick the two pieces of white cardstock together short sides joining. On the bottom of the cardstock (leaving enough room for labelling) draw a line that is 40cm long this represents the Mesozoic Era all 200 million years of it. With the first colour of paper cut out a strip 10cm long. This is the Triassic Period.Triassic Period, in geologic time, the first period of the Mesozoic Era. It began 252 million years ago, at the close of the Permian Period, and ended 201 million years ago, when it was succeeded by the Jurassic Period. The Triassic Period marked the beginning of major changes that were to take Triassic Period, Mesozoic Era, Phanerozoic Eon [252 Myr - 201 Myr ] Dinosaurs became the dominant species in the Triassic Period. In North America there is not much marine sedimentary rock of this period.The Paleozoic is a time in Earth's history when active complex life forms evolved, took their first foothold on dry land, and when the forerunners of all multicellular life on Earth began to diversify. There are six periods in the Paleozoic era: Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian. Figure 29.4 C. 1: Quadruped dinosaurs: Edmontonia, an example of an extinct quadruped reptile, was an armored dinosaur that lived in the late Cretaceous period, 145.5 to 65.6 million years ago. Dinosaurs dominated the Mesozoic Era, which was known as the “Age of Reptiles.”. The dominance of dinosaurs lasted until the end of the Cretaceous ...At the beginning of the Mesozoic Era during the Triassic, the ocean’s reefs were hard hit by the Permian extinction. It took millions of years for new, diverse seafloor ecosystems to evolve. By the time of the Jurassic, the seafloor was again thriving, but the reef's composition was different than the reefs we think of today.The Mesozoic Era (252 to 66 million years ago) The Mesozoic Era had a lot of “firsts”. For example, it had the first birds, first mammals, first dinosaurs, and first …The climate most likely remained warm throughout the Mesozoic. · During the last part of the Mesozoic (called the Cretaceous period) the climate warmed very much ...Reptile - Evolution, Paleontology, Adaptation: The first land vertebrates, the Tetrapoda, appeared near the middle of the Devonian Period. The earliest known reptiles, Hylonomus and Paleothyris, date from the Late Carboniferous. The Mesozoic Era is known as the “Age of Reptiles.” Today's reptiles represent only a fraction of the reptile groups and species that have lived.Cenozoic era. In geologic time, the Cenozoic Era, the third era in the Phanerozoic Eon, follows the Mesozoic Era and spans the time between roughly 65 million years ago (mya) and present day. On the geologic time scale, Earth is currently in the Cenozoic Era of the Phanerozoic Eon. The Cenozoic Era contains two geologic time …May 24, 2023 · The three time periods of the Mesozoic Era are separated by extinction events or geological transformations that caused a significant change in the organic makeup or environmental conditions of the world. The Triassic period, Jurassic period, and Cretaceous period each encompass about 50 to 80 millions years on a geologic time scale. The sales staff should discuss the product value first and then cbd back pain the price in the time do cbd gummies actually help with anxiety sequence of the negotiation. ... the Mesozoic Jurassic and Cretaceous have cbd gummies 1000mg jar run wild and ruled the earth 1. ... After a period of time, Alex began to think back to the time he was ...Cenozoic (66 million years ago until today) means ‘recent life.’ During this era, plants and animals look most like those on Earth today. Periods of the Cenozoic Era are split into even smaller parts known as Epochs, so you will see even more signposts in this Era.23 Tem 2019 ... It spanned from about 252 to 66 million years ago and is divided into three periods: Triassic, Jurassic, and Cretaceous. The Cretaceous period ...The Triassic period was the first period of the Mesozoic era and occurred between 251.9 million and 201.3 million years ago. It followed the great mass extinction at the end of the Permian period and was a time when life outside of the oceans began to diversify. The Mesozoic Era is divided into three time periods: the Triassic (251-199.6 million years ago), the Jurassic (199.6-145.5 million years ago), and the Cretaceous (145.5-65.5 million years ago).*Dec 26, 2022 · The Mesozoic era was a time of geological and biological transformation. During this time period, the continents began to evolve into their current configurations. An infinite number of geological periods are known by two names: the Precambrian and the Phanerozoic. Triassic Period (240 to 208 million years ago) At the beginning of the Mesozoic Era, the “supercontinent” began to break up. Deserts covered part of the interior, but shallow seas re-invaded the lowlands. Reptiles evolved rapidly, and two important new groups appeared. Therapsids (mammal-like reptiles) gave rise to true mammals by the end ... The Mesozoic Era [3] is the second-to-last era of Earth's geological history, lasting from about 252 to 66 million years ago, comprising the Triassic, Jurassic and Cretaceous Periods. The Mesozoic Era began approximately 252 million years ago at the close of the Paleozoic Era and ended 66 million years ago at the dawn of the Cenozoic Era. The Mesozoic is best known as the time of the dinosaurs. Dinosaurs first appeared early in the Mesozoic and came to dominate life on Earth throughout the rest of the era. The Mesozoic is ... The current era on the geologic time scale is the Cenozoic Era. The era began after the K-T extinction resulted in the end of the Mesozoic Era around 65 million years ago. The extinction of the dinosaurs gave mammals the chance to prolifera...The Cretaceous (IPA: / k r ɪ ˈ t eɪ ʃ ə s / krih-TAY-shəs) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest.At around 79 million years, it is the longest geological period of the entire Phanerozoic.The name is derived from the Latin creta, "chalk", which is …The Mesozoic Era was a time of significant geological, climatic and evolutionary activity. The supercontinent Pangea slowly rifted apart and the continents of ...The Triassic ( / traɪˈæsɪk / try-ASS-ik; sometimes symbolized 🝈) [8] is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya ), to the beginning of the Jurassic Period 201.4 Mya. [9] The Triassic is the first and shortest period of the Mesozoic Era. ... Mesozoic Era, continued. The Cretaceous Period. Among the common Cretaceous ... timeline shows the time divisions of the Mesozoic and. Cenozoic eras. 12. Human ...Triassic Period, in geologic time, the first period of the Mesozoic Era.It began 252 million years ago, at the close of the Permian Period, and ended 201 million years ago, when it was succeeded by the Jurassic Period.. The Triassic Period marked the beginning of major changes that were to take place throughout the Mesozoic Era, …Spanning around 200 million years, the Mesozoic Era was characterized by rapid evolution of life on the Earth, most noteworthy being the rise and fall of the dinosaurs. In the plant kingdom, the flowering plants appeared for the first time. Read this ScienceStruck article to know more about various characteristics of this era, like the plants, animals, climatic conditions, and major events. Jan 20, 2019 · This chart is a simple overview of the Triassic, Jurassic, and Cretaceous periods, all of which were part of the Mesozoic era. In brief, this incredibly long period of time, measured in "mya" or "millions of years ago," saw the development of dinosaurs, marine reptiles, fish, mammals, flying animals including pterosaurs and birds, and a huge ... The Mesozoic Era began 252.2 million years ago, following the conclusion of the Paleozoic Era, and ended 66 million years ago, at the dawn of the Cenozoic Era.1 Tem 2022 ... “Dinosaurs were there during the Triassic under the radar all the time ... periods/Mesozoic era/Triassic period; /Physical sciences/Earth ...Paleozoic Era, In geologic time , the Paleozoic Era, the first era in the Phanerozoic Eon , covers the time between roughly 544 million years ago (mya) and until 24… Pliocene Epoch, In geologic time , the Pliocene Epoch occurs during the Tertiary Period (65 million years ago [mya] to 2.6 mya) of the Cenozoic Era of the Phanerozoi…20 May 2021 ... The Mesozoic era (∼252 to 66 million years ago) was a key interval in Earth's evolution toward its modern state, witnessing the breakup of ...The Mesozoic (from the Greek prefix meso meaning “between” and zoon, animal or "living being") era is an interval of about 186 million years defined on the geologic timescale as spanning roughly from 251 to 65 million years ago (mya), and as being the second of three eras of the Phanerozoic eon. The Mesozoic era lies between the earlier ...Cenozoic (66 million years ago until today) means ‘recent life.’ During this era, plants and animals look most like those on Earth today. Periods of the Cenozoic Era are split into even smaller parts known as Epochs, so you will see even more signposts in this Era. The Mesozoic Era is literally the era of “middle life.”. It is also known as the age of dinosaurs. It lasted from 245 to 65 million years ago and is divided into the three periods described in Figure below. The Mesozoic began with the supercontinent Pangaea. Then, during the era, Pangaea broke up and the continents drifted apart.The Mesozoic Era lasted about 180 million years, from about 245 million years ago to about 65 million years ago. The Mesozoic is divided into just three time periods: the Triassic, …The Mesozoic and Cenozoic eras make up the youngest half of the Phanerozoic. The Triassic Period, the youngest period of the Mesozoic Era, was the time in which ...Aug 29, 2019 · The final time period on the Geologic Time Scale is the Cenozoic Period. With large dinosaurs now extinct, smaller mammals that had survived were able to grow and become dominant. The climate changed drastically over a relatively short period of time, becoming much cooler and drier than during the Mesozoic Era. Mesozoic The middle of three eras that constitute the Phanerozoic period of time. The Mesozoic (literally ‘middle life’) was preceded by the Palaeozoic Era and followed by the Cenozoic Era. It began with the Triassic approximately 245 Ma ago and ended around 65 Ma at the start of the Tertiary.The Quaternary period is subdivided into the Pleistocene and Holocene epochs. The Holocene epoch began about 11,700 years ago. If the Mesozoic era was the Age of Reptiles, the Cenozoic era is the Age of Mammals. The Paleogene period saw the development and spread of early forms of many animals, including horses, sheep, and cattle.The Mesozoic Era is a period of time that lasted approximately 200 million years and ended with an asteroid that caused the mass extinction of dinosaurs on planet Earth. Learn about the climates ...

Death: Sixty-five million years ago (the end of the Cretaceous Period), 183 million years after the Permian extinction and the beginning of the Mesozoic Era, a cataclysmic event occurred which resulted in the extinction of the dominant dinosaurs as well as many species of plants and animals on land and in the ocean. The evidence to date points ... . Parking lot 60

Learn about the time period that took place 251 to 199 million years ago. ... The start of the Triassic period (and the Mesozoic era) was a desolate time in ...The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth's history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years). It chronologically organises strata, and subsequently time, by observing fundamental changes in stratigraphy that correspond to major geological or paleontological ...Mid to late Mesozoic Era. Cretaceous. In the Early Cretaceous, Britain ... The Palaeoproterozoic and Archaean cover a very long period of geological time during ...The Triassic period was the first and earliest period in the Mesozoic era timeline. The Triassic period lasted from 252 to 201 million years ago. ... The Mesozoic era was a time in Earth's history ...The final period of the Mesozoic era, the Cretaceous period, which happened about 145 to 65 million years ago, saw the largest and the most diverse range of dinosaurs. Some of the most heaviest and brutal dinosaurs, like the Tyrannosaurus rex, lived in the Cretaceous period. The end of the Mesozoic era was marked by the mass extinction, wiping ...Spanning around 200 million years, the Mesozoic Era was characterized by rapid evolution of life on the Earth, most noteworthy being the rise and fall of the dinosaurs. In the plant kingdom, the flowering plants appeared for the first time. Read this ScienceStruck article to know more about various characteristics of this era, like the plants, animals, climatic conditions, and major events. Cenozoic Era, third of the major eras of Earth’s history, beginning about 66 million years ago and extending to the present. It was the interval of time during which the continents assumed their modern configuration and geographic positions and during which Earth’s flora and fauna evolved toward those of the present.520 million years ago. Study with Quizlet and memorize flashcards containing terms like How long ago did oceans begin to form?, What does the geologic time scale confirm about the Cretaceous period?, Scientists discovered that the Eocene time period existed in Earth's history around 34 MYA. What do they need to do to determine what time period ...Cenozoic (66 million years ago until today) means ‘recent life.’ During this era, plants and animals look most like those on Earth today. Periods of the Cenozoic Era are split into even smaller parts known as Epochs, so you will see even more signposts in this Era. Simplified Geologic Time Scale. Era. Period or System. Epoch or Series. Cenozoic. (66 million years ago - Present) characterized by the emergence of the Himalayas (cooling, reduced CO 2 ) also, delineated by the K-T boundary. The Cascade Range began approximately 36 million years ago, with the major peaks appearing early to middle Pleistocene.Triassic Period, Mesozoic Era, Phanerozoic Eon [252 Myr - 201 Myr ] Dinosaurs became the dominant species in the Triassic Period. In North America there is not much marine sedimentary rock of this period.An era is not a defined number of years. Rather, it is a period of time marked by certain characteristics, such as historical events. In geology, an era is composed of periods. According to the Encyclopedia Britannica, geological eras encom...Test your knowledge of the fluffy, winged dinos of the bygone Mesozoic era, from little Microraptor to the enormous Yutyrannus with this quiz. Advertisement Advertisement Advertisement Advertisement Advertisement Advertisement Advertisement...Only Daqing was in the Cretaceous Period and the Mesozoic Period. No other strata were involved. ... After a period of time, its performance will decline and fall off, and individual wires will be broken, because after the battery is made, it is welded one by one and collected. ... We have entered such a high speed era, the era of terabits ...The Triassic period was the first period of the Mesozoic era and occurred between 251.9 million and 201.3 million years ago. It followed the great mass extinction at the end of the Permian period and was a time when life outside of the oceans began to diversify. Apr 10, 2022 · The Triassic period was the first and earliest period in the Mesozoic era timeline. The Triassic period lasted from 252 to 201 million years ago. ... The Mesozoic era was a time in Earth's history ... Triassic Period (240 to 208 million years ago) At the beginning of the Mesozoic Era, the “supercontinent” began to break up. Deserts covered part of the interior, but shallow seas re-invaded the lowlands. Reptiles evolved rapidly, and two important new groups appeared. Therapsids (mammal-like reptiles) gave rise to true mammals by the end ....

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