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As shown on the History Channel. Why do we have ice ages and when is the next one due? Chart the progress of different ice ages through the history of our planet, from Snowball Earth hundreds of millions of years ago to the recent ice ages. As the Earth circles the sun, its orbit changes slightly and so does it angle of rotation. When the right wobble in our rotation combines with the right orbit, the Earth is, and will again be, plunged into an ice age--but maybe not for a few thousand years.
(Source: DCMP)
The disappearance of the dinosaurs at the end of the Cretaceous period posed one of the greatest, long-standing scientific mysteries. This three-act film tells the story of the detective work that solved it. Shot on location in Italy, Spain, Texas, Colorado, and North Dakota, the film traces the uncovering of key clues that led to the discovery that an asteroid struck the Earth 66 million years ago, triggering a mass extinction of animals, plants, and even microorganisms. Each act illustrates the nature and power of the scientific method.
For over a century, tens of millions of visitors have marveled at the natural beauty of Yellowstone National Park, home to the largest concentration of geysers in the world, including the iconic Old Faithful. Visitors may not realize it, but Yellowstone is situated directly above one of the largest volcanic systems on Earth-a supervolcano. For the past two million years, this volcano has erupted roughly every 600,000 years. The last major eruption, which produced a caldera that stretches over 1,500 square miles across the park-two-thirds the size of Prince Edward Island-occurred 640,000 years ago. So, is it overdue for another eruption?
As shown on the History Channel. Mount Vesuvius is the world's most dangerous volcano, and it threatens three million people. It was responsible for the most famous natural disaster of ancient history, the eruption that destroyed the Roman city of Pompeii. And its most recent blast was caught on film in 1944. Today Vesuvius is the most densely populated volcano in the world. Now recent scientific discoveries show that it is capable of an eruption larger than ever before thought possible and that hidden beneath Vesuvius there is a vast magma chamber of boiling hot rock, ready to come out.
As shown on the History Channel. It is not only a place of natural splendor, but a geologic treasure trove as well. Hidden in the sediments of the rocks in its walls is evidence of the coldest time on our planet--ironic in one of the hottest places on Earth. Death Valley is literally being pulled apart, and the floor is collapsing and is lower than sea level. Here and across much of Nevada is the Basin and Range Province--a series of ridges of mountain ranges that are being pulled apart and the basins between them getting wider and flat as they fill with eroded sediment.
The Large Lakes Observatory (LLO) helps an interdisciplinary group of scientists use oceanographic research approaches to investigate the mysteries of large lakes. With support from the National Science Foundation, LLO scientists work to better understand the biology, chemistry, physics, and geology of these bodies of water. In the summer of 2011, LLO scientists completed a 17- day research cruise on Lakes Superior, Huron, and Erie, focusing on how a buildup of nitrates may impact the ecology of all the Great Lakes. They say a greater understanding of lakes will ultimately improve our management and conservation efforts.
In Miki, Japan, a six-story wooden model condominium was shaken by the equivalent of a 7.5 magnitude earthquake. The test was said to be the largest simulated earthquake ever attempted with a wooden structure. The full-scale building sat on a metal shake table that rocked it violently back and forth. The table, designed to hold up to 2.5 million pounds, reproduced forces based on those recorded during the 1994 earthquake in Northridge, California. But, it was scaled up by 180 percent to simulate an earthquake so violent it would only occur an average of once every 2,500 years. Part of the "Science Nation" series.
As shown on the History Channel. Gold dates from the time of the supernova explosion that gave birth to the building blocks of our solar system. When it was created, the Earth included a tiny percentage of gold atoms, and over the aeons geologic processes have concentrated it into various nooks and crannies around the globe. The best of it is in the ancient Precambrian rocks in South Africa, where the deepest mines in the world extract it. In other regions of the world, gold can be gathered from younger sedimentary rocks that have been eroded off older Precambrian rocks. The American gold rush was this type of deposit. Now in Nevada, sedimentary rocks are leached on a truly vast scale to extract the gold.
The Magic School Bus is an award winning animated children’s television series based on the book series of the same title by Joanna Cole and Bruce Degen. It is notable for its use of celebrity talent and being both highly entertaining and educational. To celebrate the founding of Walkerville, Ms. Frizzle's class sculpts a stone likeness of its founding father, Captain Walker. But as they add the finishing touches, the statue tumbles down the mountain. Ms. Frizzle turns the bus into a giant boulder and the kids into rock kids. They bump down the mountain in a desperate attempt to save the statue. By the time they reach the celebration at the base of the mountain, they've been pushed, tossed, sanded, polished, and eroded by water.
Hawaii's Kilauea volcano is one of the best places on Earth to study processes within basaltic volcanoes. Its high eruption frequency, easy access to lavas, and distinct geologic setting far from plate boundaries or continents allow researchers to address fundamental problems related to active volcanoes. Another constant at Kilauea, besides the flowing lava, has been University of Hawaii geologist Mike Garcia. With support from the National Science Foundation, Garcia has been leading studies of Kilauea for a generation, adding to the extensive knowledge base on this volcano. Two of the primary goals are to determine what has triggered Kilauea’s effusive, explosive cycles over the last 2200 years and when long eruptions, such as the current one, will stop. Part of the National Science Foundation Series “Science Nation.”
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, dawn is breaking in the village, Moko and Mei-Lei are sound asleep. The earth begins to rumble, and an earthquake suddenly wakes them. Mei-Lei is so afraid she is shaking and Moko asks her to sing. As she sings, the ground slowly stops shaking. Moko and Mei-Lei head back to the village thinking that the ground must sleep so soundly that every so often it is woken up by the song of people wandering along its back.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, one morning, Alarick and Moko head into the sea to go fishing. They take a small boat and anchor in the shadow of a great boulder of ice to protect them from the wind. When they wake up they don't recognize their surroundings. The iceberg is drifting along the waves and is dragging their boat along with it. Moko is confident the ocean is showing them where there will be more fish for them to bring back to the village.
As shown on the History Channel. In the remote wastes of Siberia buried under snow are the remains of one of the greatest catastrophes that the Earth has endured. 250 million years ago, huge volumes of lava spewed out onto the surface--so much that it would have buried the whole of Texas under one mile of lava. At first the temperature dipped but then the greenhouse gases that escaped from the depressurized lava caused a massive global warming. It wreaked havoc, and 95% of the species on Earth became extinct. Yet life hung on and in time this disaster paved the way for the next phase of life on earth--the age of the dinosaurs.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, soaring over the desert, Moko and Totemie finally see the blue expanse of the ocean. Then a string of tiny islands covered in green and white. Fascinated by the view, they don't notice the wind picking up. As the wind gets stronger it shakes their kite and Totemie lets go, and Moko lets go as well so she won't fall alone. They fall into the water in a beautiful lagoon which they discover together, their courage rewarded.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko bids farewell to Totemie. As promised, he gives Mei Li's stone and Alarick's flute. She in turn gives him a present that he may only open when he arrives at his destination. One morning, he sees the coast of his land after battling through a tornado! When he gets to shore, he opens Totemie's gift and finds not only her bracelet, but also Mei-Lei's stone and Alarick's flute and realizes that the greatest gift has been meeting his new friends.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko and Mei-Lei are resting as the day is fading. Suddenly, they hear a strange sound coming from behind the mountain that resonates throughout the village. The two friends go off to find the source of this strange sound and what they see surprises them. Two men are blowing into what look like long horns while others walk along with them and sing. They head back towards their village, confident that they have solved the mystery of the echo.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko is enjoying the seashore on the beach when Mei-Lei comes to get him to go fishing. They sail out into the sea and in the distance Moko sees what looks like a hill. Mei-Lei tells him that is actually a giant wave! All of a sudden, the tsunami lifts their boat high into the air and propels it forward. The wave crashes down and drops their boat right at the entrance to the village. Moko believes that they were kept safe because he knew to trust the ocean.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, Moko and Mei-Lei suddenly hear a continuous sound coming from beyond the beach. As they approach the hills, the sound gets louder and Mei-Lei is more frightened, so Moko decides to go around the dune on his own. As he does so, the sound changes and becomes more of a song. Moko returns and tells Mei-Lei that it is the sand and the ground singing together. Moko thinks that the magical dune is urging him to go on with his travels and he knows that this is likely his last day in the village.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, the storm has passed and Moko's raft is approaching a new shore. He has never seen this white sand beach and wonders where he might be. Moko wanders off to find inhabitants of this new place. Along his route he passes plants with enormous leaves and at the other end of his path, the beach once again! How is this possible? What is the secret of this strange islandy? Night falls and Moko falls asleep convinced that he is the first traveler to discover the ocean's secret island.
Moko is an explorer. As he travels the world continent by continent, he makes many friends and discovers many natural phenomena which sometimes delight him, and other times scare him. Each animated episode recounts an adventure and takes an "original story" approach to explaining these natural phenomena. In this episode, after a long voyage Moko arrives in Amazonia. He thinks that all of the people from this country must be giants because the trees in the forest he comes across are enormous. He climbs the tallest tree he can find and looks out towards the landscape and sees that the trees stretch out as far as the eye can see. Moko wonders if this is what the end of the world looks like. He feels quite alone and makes a wish to the stars to put a new friend on his path.
