

Introduction to Paleontology
The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alın
Şartlar geçerlidir
Bölümler
S1 B1 - History on a Geological Scale
10 Kasım 201633 dakTake an exciting virtual walk from the Washington Monument to the US Capitol to explore the 4.54 billion-year history of Earth, with each of your strides representing 1 to 2 million years. Along the way, fossils will paint a picture of life on Earth, from the earliest known bacteria to our world today.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B2 - Life Cast in Ancient Stone
10 Kasım 201634 dakLearn about the fascinating individuals and showmen whose curiosity about the Earth and its fossils led to the development of the science of paleontology. But how easy is it to find fossils? Learn about the geographic, climatic, and chemical requirements for a living organism to leave behind its fossilized record.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B3 - Tools of the Paleontological Trade
10 Kasım 201633 dakIn addition to the basic mechanical tools still used in the field today, paleontologists now have an exciting digital tool chest. What can we learn from dispersive x-ray spectroscopy and x-ray computer tomography when they are used to examine fossils from the size of pollen to the bones of Tyrannosaurus rex?The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B4 - How Do You Fossilize Behavior?
10 Kasım 201631 dakWhile we rarely, if ever, find the fossilized remains of certain types of organisms, we can find evidence of their existence as they interacted with the environment. Learn how these trace fossils (e.g., fossilized burrows, tracks, ripples, nests, feces) help us understand the early evolution of the biosphere and the diversification of animal life.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B5 - Taxonomy: The Order of Life
10 Kasım 201629 dakHow much does the scientific name of an animal, past or present, really matter? From Carl Linnaeus' Systema Naturae to the modern system of cladistics, you'll be amazed how much we can learn about the history of life on Earth simply from our ongoing efforts at classification.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B6 - Minerals and the Evolving Earth
10 Kasım 201631 dakPaleontology provides a different lens to view how our planet's 4,400 minerals developed over billions of years - both influencing and being influenced by our evolving biosphere. Learn how Earth's few primordial minerals interacting with liquid water, plate tectonics, and eventually photosynthesis would create an explosion of mineral species seen nowhere else in our solar system.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B7 - Fossil Timekeepers
10 Kasım 201633 dakOur planet's fossil record reveals that the natural cycles we take for granted today were previously quite different. Learn how biostratigraphy, sclerochronology, Carbon-14 dating, and other tools reveal a historic Earth with a day as short as six hours and a year as long as 455 days.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B8 - Fossils and the Shifting Crust
10 Kasım 201634 dakWhy do we find life on Earth exactly where it is today? Why are some species found only in isolated pockets while others are spread across multiple continents? Learn what fossils tell us about our planet's exciting historic migrations - of flora, fauna, and the continents themselves.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B9 - Our Vast Troves of Microfossils
10 Kasım 201632 dakWhen we think of fossils, we tend to visualize large shells or bones. Microfossils, though, can reveal a more complete and dynamic picture of the past, including some of the most ancient history of life on Earth and details of climate change over hundreds of millions of years with a resolution just not possible from large "macro" fossils.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B10 - Ocean Fire and the Origin of Life
10 Kasım 201631 dakFor centuries, scientists believed all life on Earth was powered by the sun via photosynthesis. That was before ecosystems, powered by chemosynthesis, were found at volcanic oceanic ridge systems. Paleontologists have now found examples of fossilized vent systems over a billion years old and the life that lived around them.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B11 - The Ancient Roots of Biodiversity
10 Kasım 201630 dakWhat is the Cambrian explosion? Why did Charles Darwin find the apparent sudden emergence of complex life so puzzling, and what have paleontologists today revealed about this period of Earth's history? Learn what the very latest findings tell us about how the stage might have been set for such rapid adaptation and diversification of life on Earth.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B12 - Arthropod Rule on Planet Earth
10 Kasım 201631 dakArthropods live successfully all around the Earth today, but it was an extinct group of arthropods, the trilobites, that dominated the globe following the Cambrian explosion. With the benefits of exoskeletons and their well-developed eyes, trilobites were a significant presence in Earth's oceans for 250 million years, evolving into more than 20,000 species with a variety of life styles.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B13 - Devonian Death and the Spread of Forests
10 Kasım 201630 dakToday, we look at forests as a sign of a healthy biosphere. But is it possible that the earliest forestation of our planet (as plants became larger; developed seeds, roots, and wood; and expanded away from the shoreline) could be responsible for mass extinction towards the end of the Devonian period?The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B14 - Life’s Greatest Crisis: The Permian
10 Kasım 201632 dakWhat could have caused the Permian mass extinction, when around 90 percent of all species became extinct in the geological blink of an eye? Learn what paleontology reveals about the cascading series of events that led to runaway global warming and the greatest catastrophe faced on Earth since the evolution of complex life.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B15 - Life’s Slow Recovery after the Permian
10 Kasım 201632 dakAlthough after most mass extinctions, the biosphere is well on its way to recovery within several hundred thousand years, recovery took many times longer after the Permian extinction. Eventually though, life adapted and diversified into a wide variety of exciting new plants and animals. Enter the dinosaurs.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B16 - Dinosaur Interpretations and Spinosaurus
10 Kasım 201632 dakLearn how a recent discovery might answer "Romer's Riddle" and give us a new picture of Spinosaurus, the largest carnivorous dinosaurs to have ever lived. With an elaborate sail on his back and an interpretation that this dinosaur may have been semi-aquatic, Spinosaurus is at the center of much debate in the paleontological community today.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B17 - Whales: Throwing Away Legs for the Sea
10 Kasım 201630 dakLearn how descendants of a small, raccoon-sized animal that lived in India evolved into modern marine whales. From this small herbivore, within the geological blink of an eye, the power of natural selection would generate a whole array of wonderful creatures including the blue whale, possibly the largest animal to have ever lived on Earth.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B18 - Insects, Plants, and the Rise of Flower Power
10 Kasım 201631 dakWe owe a lot to the angiosperms. Not only do their flowers create a world of beauty, but their fruits helped drive human civilization. But did flowers first appear in water or on land? And what is the history and origin of the wonderful partnership between insects and flowering plants?The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B19 - The Not-So-Humble Story of Grass
10 Kasım 201630 dakWith the evolution of grasses came the grassland biomes: the prairies, pampas, and steppes that cover almost 40 percent of Earth's land surface today. Learn how this biome impacted animal evolution, including our own ancestors as they moved out of Africa and around the planet, facilitated by a carpet of grasses.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B20 - Australia’s Megafauna: Komodo Dragons
10 Kasım 201628 dakMeet the Komodo dragon, a 200-pound lizard found on several relatively small Indonesian islands today. Paleontologists now know these specimens are a relic population of a lineage of giant monitor lizards once common in Australia. But exactly how did these animals make that trip? And how much longer is their species likely to survive?The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B21 - Mammoths, Mastodons, and the Quest to Clone
10 Kasım 201630 dakWhen the Mastodon became the first extinct species to be discovered, much that the Western world knew to be true (i.e., the Biblical description of the creation timeline) was suddenly called into question. Today, the Mastodon offers us another major ethical challenge: Would it be possible for scientists to use their DNA and "bring them back?"The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B22 - The Little People of Flores
10 Kasım 201629 dakAlthough little folk are common characters in mythology, scientists had never thought they actually existed, until a team of archaeologists made a fascinating discovery on the Indonesian island of Flores in 2003. But who exactly is Homo floresiensis? And through what lineage could we be related?The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B23 - The Neanderthal among Us
10 Kasım 201631 dakFor years, we thought of Neanderthals as brutish, ignorant, distant cousins we could mostly ignore. Not any longer. As revealed by The Neanderthal Genome Project, modern humans and Neanderthals were sufficiently similar to have interbred and produced viable offspring. As much as 30 to 40 percent of the Neanderthal genome may be spread the human population today.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alınS1 B24 - Paleontology and the Future of Earth
10 Kasım 201641 dakWhat paleontologists have learned about Earth's history so far reveals that change is just about our only constant. Given that only a minute fraction of the information held in the Earth's crust has been discovered so far, paleontology will continue to be a significant gateway to understanding the past and present, and perhaps provide insight into the future of our planet.The Great Courses Signature Collection veya The Great Courses Signature Collection & Living kanalına abone olun veya satın alın