

The Origin and Evolution of Earth: From the Big Bang to the Future of Human Existence
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T1 E1 - Mineralogy and a New View of Earth
16 de octubre de 202438 minBegin your study of Earth's history by voyaging backward in time, seeing how each crucial stage in the evolution of our planet depended on what came before. Preview the surprising role played by minerals, which coevolved with life-a link that provides a revolutionary new way of understanding Earth.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E2 - Origin and Evolution of the Early Universe
16 de octubre de 202432 minEarth has existed for only a third of the history of the universe. What happened before our planet formed? Journey back to the big bang, learning how fundamental forces and particles froze out of a homogeneous state in the initial moments of cosmic evolution.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E3 - Origins of the Elements—Nucleosynthesis
16 de octubre de 202433 minDiscover how simple atoms of hydrogen and helium make stars, and how stars manufacture all other naturally occurring elements through processes including titanic supernova explosions. Called nucleosynthesis, this remarkable mechanism is responsible for the chemical richness that made Earth possible.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E4 - Ur-Minerals, First Crystals in the Cosmos
16 de octubre de 202432 minTrace the origin of minerals and discover a surprising candidate for the first crystal forged in the cauldron of dying stars. Then follow the processes that created other early minerals, which survive in their original form in microscopic presolar dust grains in interplanetary space.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E5 - Presolar Dust Grains—Chemistry Begins
16 de octubre de 202432 minUnravel the story told in "presolar" grains of dust formed by stars very different from our sun. These are the earliest building blocks of our own solar system. Learn how scientists identify these microscopic particles, which often contain diamond crystals. Also see how the field of cosmochemistry is revolutionizing the study of minerals.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E6 - Coming to Grips with Deep Time
16 de octubre de 202430 minPlunge into deep time-the vast period that reaches back to Earth's beginning. Professor Hazen walks you through a memorable analogy that orients you along this sea of ceaseless change. Also explore the techniques that allow scientists to date rocks and other materials with astonishing precision.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E7 - The Birth of the Solar System
16 de octubre de 202430 minWhere did Earth and the solar system come from? See how an idea proposed in the 18th century provides a simple and elegant answer to this question. Compare our solar system with other planetary systems that have recently come to light in the successful search for extrasolar planets.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E8 - The Early Solar System—Terrestrial Planets
16 de octubre de 202430 minInvestigate the work of the most successful planet-hunter of all time: the Kepler spacecraft, which found thousands of candidate planets orbiting other stars. Then focus on the origin of the four terrestrial planets in our inner solar system: Mercury, Venus, Earth, and Mars.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E9 - Hints from the Gas Giants and Their Moons
16 de octubre de 202430 minTour Jupiter, Saturn, Uranus, and Neptune—the four gas giants of the outer solar system. Each is a mammoth world of violent weather, and each has multiple moons that help shed light on Earth's story. View this strange realm through the eyes of far-traveling space probes.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E10 - Meteorites—The Oldest Objects You Can Hold
16 de octubre de 202429 minMost meteorites that fall to Earth are older than Earth itself. Review our understanding of these artifacts of the solar nebula, learn where most meteorites are found, and hear about Professor Hazen's experiences searching for meteorites in the murky world of international meteorite trading.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E11 - Mineral Evolution, Go! Chondrite Meteorites
16 de octubre de 202433 minFocus on the most numerous class of meteorites: chondrites. These incredibly ancient rocks tell a story of intense pulses of radiation from the infant sun, which melted dust grains into sticky rocky droplets called chondrules. Countless chondrules clumped together to form chondrite meteorites.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E12 - Meteorite Types and Planetesimals
16 de octubre de 202433 minAs planetesimals grew, the primary chondrite minerals were altered in ways that formed a different class of meteorites: achondrites. Study these fascinating relics from destroyed mini-planets. Some achondrites were blasted off the moon and Mars, including one specimen purported to show evidence of ancient extraterrestrial microbes.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E13 - Achondrites and Geochemical Affinities
16 de octubre de 202432 minHaving surveyed the first stage of mineral evolution during the solar nebula phase, turn to stage two, which saw an explosion of mineral diversity during the accretion of protoplanets. One key to understanding how minerals began to diversify during this period is the influential classification scheme developed by geochemist Victor Goldschmidt.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E14 - The Accretion and Differentiation of Earth
16 de octubre de 202434 minFollow the stages of Earth's initial formation, as solar system debris in our neighborhood of space collided until one object dominated, growing into the embryonic Earth. Trace the process of differentiation that produced a distinct core, mantle, and crust; and learn how scientists know the details of Earth's deep interior.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E15 - How Did the Moon Form?
16 de octubre de 202430 minInvestigate the case of the massive moon. Where did Earth's unusual moon come from? Explore the three possibilities considered before the Apollo moon landings gave scientists actual lunar samples to analyze. Also hear the story of Professor Hazen's close encounter with moon dust.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E16 - The Big Thwack!
16 de octubre de 202432 minContinue your investigation of the moon's origin. The simplest theory that explains the evidence is the "big thwack" model. Study this scenario, which has all the drama of a disaster movie - with colliding planets and a giant moon filling Earth's sky and then slowly receding over the course of billions of years.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E17 - The “Big Six” Elements of Early Earth
16 de octubre de 202433 minSurvey Earth's six dominant elements: oxygen, magnesium, aluminum, silicon, calcium, and iron. Each has played a key role in Earth's history, governed by the element's distinctive chemical character. Examine this chemistry and learn, for example, why virtually all oxygen on the planet is locked in minerals and rocks.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E18 - The Black Earth—Peridotite to Basalt
16 de octubre de 202434 minTrace the evolution of Earth's first rocks, which crystallized from the young planet's seething magma oceans. Peridotite was the earliest major rock type to form. Discover why peridotite is now found mostly deep in the mantle, while a related rock called basalt covers 70 percent of Earth's surface.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E19 - Origins of the Oceans
16 de octubre de 202432 minFollow Earth's remarkable transition from a dry world with a uniform black basaltic surface to a wet planet of rivers, lakes, and oceans. Also learn about the special properties of water, which make it a universal solvent, a vehicle for life, and the chief architect of Earth's surface features.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E20 - Blue Earth and the Water Cycle
16 de octubre de 202432 minHunt for unseen water on the moon, Mars, and Earth, discovering that copious quantities exist in unlikely places, including hundreds of miles underground. Professor Hazen tells how his lab duplicates conditions in Earth's deep interior to learn how minerals incorporate water under extreme pressure.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E21 - Earth and Mars versus Mercury and the Moon
16 de octubre de 202431 minSearch for the reason that Earth and Mars have far greater mineral diversity than Mercury and Earth's moon. Probe clues such as tiny zircon crystals that are the oldest surviving minerals on Earth. From this evidence, assemble a story of Earth's global ocean and a time when the entire planet froze over.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E22 - Gray Earth - Clays and the Rise of Granite
16 de octubre de 202433 minProbe the essential features of clay minerals, which are abundant on both Earth and Mars. Then investigate why Earth has so much granite. Trace the origin of this rock, which abounds in Earth's continents but is rare elsewhere in the solar system.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E23 - Earth's Mineralogy Takes Off—Pegmatites
16 de octubre de 202430 minContinue your study of the stages of mineral evolution by looking at what happens when granite partially melts. Under the right conditions, the resulting crystals can be unusually large and strikingly beautiful. Such rocks are called pegmatites, and their formation involves some of the rarest elements on the planet.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E24 - Moving Continents and the Rock Cycle
16 de octubre de 202430 minExplore early attempts to explain why the continents fit together like pieces of a jigsaw puzzle, including Alfred Wegener's continental drift theory and the expanding Earth hypothesis. Lay the groundwork for an understanding of the revolutionary theory of plate tectonics by reviewing the stages of the rock cycle.Periodo de prueba gratis de The Great Courses Signature Collection o compraT1 E25 - Plate Tectonics Changes Everything
16 de octubre de 202432 minResearch after World War II converged on a remarkable theory for the evolution of Earth's crust and upper mantle: plate tectonics. Study the evidence that led scientists to conclude that a dozen shifting plates explain earthquakes, volcanoes, mountain ranges, deep sea trenches, and much more.Periodo de prueba gratis de The Great Courses Signature Collection o compra
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