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Geology has long been a puzzling science. The theory of plate techtonics advanced geographical study immensely but plate techtonics can't explain the Black Hills or the walls of chalk in the fertile Kansas basin. What else has been and is creating the landscape of North America?
8) Grand Canyon
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"An exploration of the Grand Canyon on a grand scale, as only Jason Chin can illustrate and explain"--
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"As new groundbreaking research suggests that climate change played a major role in the most extreme catastrophes in the planet's history, award-winning science journalist Peter Brannen takes us on a wild ride through the planet's five mass extinctions and, in the process, offers us a glimpse of our increasingly dangerous future."--
10) Deserts
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The world's deserts are lands of extremes that force animals to come up with ingenious ways of coping with hostile conditions, giving rise to the most incredible survival stories on Earth. A pride of desert lions are so hungry they risk hunting a giraffe several times their size, while male sandgrouse fly 120 miles each day to the nearest waterhole and dice with death to collect water for their chicks. Filmed for the first time, a tiny bat does battle...
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In January 2004, two NASA rovers, Spirit and Opportunity, landed on Mars and began to explore the planet's surface. Their mission: to probe the exotic Martian geology for signs of water, past or present. In this science bulletin, scientists at NASA explain the goals and challenges of the current Mars mission, and how evidence of water could bolster the possibility that life may once have existed on Mars.
12) Restless Earth
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Wait a sec. Earth is hot on the inside? The continents move? And some German guy named Alfred Wegener noticed that Africa and South America fit together like puzzle pieces? That sounds like a magma-filled layer cake of mystery. Care to dig in? Topics include: Earth's Interior Layers, Plate Tectonics, and Evidence of Plate Tectonics.
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Forty years ago, on May 18, 1980, Mount St. Helens erupted violently. It was the most deadly and devastating eruption in U.S. history. Combining eyewitness accounts with rarely seen images, this show reveals the unfolding apocalypse — from the first moments of the volcanic blast to the 12-mile-high ash plume and the lethal mudflows that raged down the mountain.
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In program one we looked at how the natural features of the Murray-Darling Basin have shaped farming and water management practices, and how in turn those practices have changed the rivers and the land. In this second part of the series, we look at how over-allocation of water resources, climate change, salinity and other problems are threatening the long-term productivity and sustainability of the region.
17) The Planet Earth
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This program will explore the composition of Earth, including the characteristics of the Earth’s surface, life on Earth, and the planet's many kinds of plants, animals, and fish.
18) Forest Fires
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In summer, Yellowstone Park's dry forests burn for miles. The sky is dyed scarlet, the sun snuffed out by clouds of black smoke. But, in fact, these fires are responsible for sustaining the forest in the long run.