A New History of Life

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  • Premieret: Jan 2013
  • Afsnit: 36
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Sæsoner 1520
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The Interconnected Earth
Episode overview
Udgivelsesdato
Jan 01, 2013
Begin the story of life on Earth with an overview of the unifying idea that will govern your exploration. Called Earth system science, this approach views Earth as an integrated network .. show full overview
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The Vast Depths of Earth Time
Episode overview
Udgivelsesdato
Jan 01, 2013
How was the great antiquity of Earth discovered? Survey the observations that led to the concept of deep time and, in the process, developed the tools that can read the story in rocks. .. show full overview
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Fossil Clocks
Episode overview
Udgivelsesdato
Jan 01, 2013
Delve into biostratigraphy, the study of fossil sequences in rock strata. The discovery that different layers of rock are characterized by distinctive fossils solved the problem of .. show full overview
1520x4
Paleontologists as Detectives
Episode overview
Udgivelsesdato
Jan 01, 2013
Learn how paleontologists interpret fossils to reconstruct the traits and environments of extinct life forms. Examine some of the pitfalls of the field, including cultural biases that .. show full overview
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The Shifting Surface of Planet Earth
Episode overview
Udgivelsesdato
Jan 01, 2013
The history of science is marked by ideas that were before their time. One of the most important was Alfred Wegener’s concept of continental drift, which was revived in the theory of .. show full overview
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Earliest Origins—Formation of the Planet
Episode overview
Udgivelsesdato
Jan 01, 2013
Turn back the clock to Earth’s earliest epoch, focusing on these questions: How did the solar system form and why do we live on a layered, differentiated planet? What do these events and .. show full overview
1520x7
Origins of Land, Ocean, and Air
Episode overview
Udgivelsesdato
Jan 01, 2013
Investigate the origin of Earth’s ocean. Then track down the oldest rocks on the planet, which shed light on the first continents. Also explore the nature of Earth’s primordial .. show full overview
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The Early Chemical Evolution of Life
Episode overview
Udgivelsesdato
Jan 01, 2013
Probe possible scenarios for the origin of life, from the “warm little pond” filled with organic compounds that Charles Darwin envisioned, to deep ocean environments energized by .. show full overview
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Hints of the First Life Forms
Episode overview
Udgivelsesdato
Jan 01, 2013
Did Martian meteorites seed the young Earth with simple life forms? Investigate this intriguing hypothesis. Then embark on a quest for Earth’s oldest fossils, exploring their connection .. show full overview
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How Life Transformed the Early Earth
Episode overview
Udgivelsesdato
Jan 01, 2013
Trace the perils of life on the early Earth. Having survived a seething period of volcanism and a withering bombardment by asteroids, bacteria-like organisms flourished and began to .. show full overview
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Snowball Earth—Another Crisis
Episode overview
Udgivelsesdato
Jan 01, 2013
Follow the clues that suggest Earth went through a snowball phase around 635 million years ago, nearly ending life’s story. How did it happen? How was it reversed? And above all, how did .. show full overview
1520x12
Metazoans—Life Grows Up
Episode overview
Udgivelsesdato
Jan 01, 2013
Make the transition to multicellular life, which grew in complexity as oxygen levels increased in the atmosphere, supporting creatures with more intricate metabolisms. This portion of .. show full overview
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Incredible Variety—The Cambrian Explosion
Episode overview
Udgivelsesdato
Jan 01, 2013
The Cambrian period is notable for its immense variety of animals with many different body plans. In an explosion of diversification, shells, teeth, eyes, and other innovations emerged .. show full overview
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Window to a Lost World—The Burgess Shale
Episode overview
Udgivelsesdato
Jan 01, 2013
In 1909, paleontologist Charles Walcott chanced on one of the most remarkable fossil finds in history: the Burgess Shale in the Canadian Rockies. Tour some of this quarry’s astonishing .. show full overview
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The Forgotten Fossils in Earth's Story
Episode overview
Udgivelsesdato
Jan 01, 2013
Survey fossils that are often neglected in popular accounts of the history of life. Begin with corals and the reefs they build, which were teeming with invertebrates hundreds of millions .. show full overview
1520x16
Introduction to the Great Mass Extinctions
Episode overview
Udgivelsesdato
Jan 01, 2013
Earth’s fossil record is punctuated with episodes when large fractions of all species abruptly disappeared. Examine the distinction between background extinction and mass extinction. .. show full overview
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The Collapse of Earth's First Eden
Episode overview
Udgivelsesdato
Jan 01, 2013
Five mass extinctions have occurred in the last 500 million years. Focus on the first of these, which extinguished the tropical paradise that flourished in the Ordovician period. Did .. show full overview
1520x18
Making the Break for Land
Episode overview
Udgivelsesdato
Jan 01, 2013
Consider the adaptations needed to make the transition from the buoyant, nourishing realm of water onto the perilous dry land, with its temperature extremes and relentless pull of .. show full overview
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Getting a Backbone—The Story of Vertebrates
Episode overview
Udgivelsesdato
Jan 01, 2013
Search for the earliest vertebrates, which arose from chordates—animals with a rod-shaped notochord. Also probe the mystery of an extinct chordate called the conodont, which is valuable .. show full overview
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The Evolution of Jaws
Episode overview
Udgivelsesdato
Jan 01, 2013
The first vertebrates were easy targets for killer arthropods and other marine predators. What eventually gave them the upper hand? Trace the circuitous evolution of jaws and the rapid .. show full overview
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These Limbs Were Made for Walking
Episode overview
Udgivelsesdato
Jan 01, 2013
How did vertebrates make the leap from water to land? Follow the quest for evolutionary transitional forms for land-dwelling vertebrates, focusing on the competing theories of gradualism .. show full overview
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Tiktaalik—The Search for a Fishapod
Episode overview
Udgivelsesdato
Jan 01, 2013
Hunt for the fishapod—the missing link between fish and four-limbed vertebrates, or tetrapods. Begin by investigating some “living fossils,” including the celebrated Coelacanth. Then .. show full overview
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Carboniferous Giants and Coal
Episode overview
Udgivelsesdato
Jan 01, 2013
Most of the world’s coal deposits were laid down in the Carboniferous period, about 300 million years ago. Tour the global environment that created this unique formation and spawned many .. show full overview
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Amniotes—The Shape of Things to Come
Episode overview
Udgivelsesdato
Jan 01, 2013
Search for the origin of amniotes, which are egg-laying tetrapods, such as reptiles. Delve into the history of classification systems for life. The Linnaean system is based on .. show full overview
1520x25
Permian Extinction—Life's Worst Catastrophe
Episode overview
Udgivelsesdato
Jan 01, 2013
Examine the full extent of the cataclysm that swept Earth 251 million years ago. Called the End-Permian extinction, the event left a chilling fossil record. Survey the clues that show .. show full overview
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Finding the Killer—The Greenhouse Earth
Episode overview
Udgivelsesdato
Jan 01, 2013
Track down the smoking gun for the End-Permian extinction. Whatever was behind it plunged Earth into an intense greenhouse effect, turning the land into desert and throwing marine .. show full overview
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The Dinosaurs Take Over
Episode overview
Udgivelsesdato
Jan 01, 2013
From the reptile populations that struggled through the End-Permian extinction, the dinosaurs ultimately emerged. What conditions promoted their evolution and eventual domination of the .. show full overview
1520x28
Letting the Dinosaurs Speak—Paleobehavior
Episode overview
Udgivelsesdato
Jan 01, 2013
How accurate are portrayals of dinosaurs in today’s media? Learn what the fossil record says about how dinosaurs actually looked and lived. Also, probe the theory that dinosaurs were .. show full overview
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Conquering the Air—The Evolution of Flight
Episode overview
Udgivelsesdato
Jan 01, 2013
Take to the air to discover how creatures evolved the ability to fly. Insects made the leap first, aided by their small size. Feathered dinosaurs are thought to be the progenitors of .. show full overview
1520x30
Monsters of the Deep—Mesozoic Oceans
Episode overview
Udgivelsesdato
Jan 01, 2013
Plunge into the oceans of the Mesozoic era, 251–65.5 million years ago, discovering that some creatures look familiar, while others are incredibly alien. The descendants of one monster .. show full overview
1520x31
The Cretaceous—A Tropical Planet
Episode overview
Udgivelsesdato
Jan 01, 2013
Conditions in the mid- to late-Cretaceous were unusually tropical worldwide, with very high sea levels. As a test case in modeling ancient climates, study factors that may explain this .. show full overview
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The Sky is Falling—The End of the Dinosaurs
Episode overview
Udgivelsesdato
Jan 01, 2013
Study the most famous mass extinction of all: the disappearance of more than half of all species, including the dinosaurs, at the end of the Cretaceous period, 65.5 million years ago. .. show full overview
1520x33
The Collision of North and South America
Episode overview
Udgivelsesdato
Jan 01, 2013
By the extinction of the dinosaurs, the continents were closing in on the configuration they have today—except North and South America had not yet joined. Tour the distinct flora and .. show full overview
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The Rise of Mammals and the Last Ice Age
Episode overview
Udgivelsesdato
Jan 01, 2013
Mammals evolved at the same time as the dinosaurs but did not come into their own until well after their much larger competitors went extinct. Trace the rise of mammals and their .. show full overview
1520x35
The Humble Origins of Human Beings
Episode overview
Udgivelsesdato
Jan 01, 2013
Bearing in mind that humans are a transitional species, not the climax of creation, chart our humble origins and the source of our most distinctive feature: a large brain. Study the .. show full overview
1520x36 Serieafslutning
The Conscious Earth
Episode overview
Udgivelsesdato
Jan 01, 2013
Close your exploration of the history of life on Earth by charting the evolution of consciousness. When did our progenitors first become self-aware, and what were the implications for .. show full overview

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