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Earthquakes have always been a terrifying phenomenon, and they’ve become more deadly as our cities have grown — with collapsing buildings posing one of the largest risks. But why do buildings collapse in an earthquake? And how can it be prevented? Vicki V. May explains the physics of why it is not the sturdiest buildings, but the smartest, that will remain standing.
Their beauty has captivated us for millennia. Their cost can be extraordinary–some are even considered priceless. Precious gems like diamonds, rubies, emeralds, opal, and jade are the ultimate treasures of the earth, and each one is made from a specific–and often torturous–recipe of chemistry, pressure, and heat. The secrets to their sparkle, color, and even strength lie deep inside the gems themselves, but could they also hold clues to one of the most enduring mysteries in the field of geology? From Tiffany’s workshop in New York to the sapphire mines of Sri Lanka, from North Carolina’s emerald fields to the jade-laden Forbidden City of China.
Part 1 • Treasures of the Earth • 2016 • Environment
As winter approaches, field teams are finishing up their science for the season. It's the last chance to obtain information for their research on the frozen continent. As most people are preparing to leave, a container ship is on its way in to supply food and materials to the skeleton crew that remains during the cold, dark winter months.
6/6 • Continent 7: Antarctica • 2017 • Environment
Surviving the bone-chilling cold, deadly blizzards and darkness of an Alaskan winter takes courage, cunning and remarkable endurance. In the raw beauty of windswept mountain peaks, icy tundra and snowbound forests, this is the story of the tough and resourceful characters that face up to the ultimate challenges of this untameable land.
Pete Postlethwaite as a man living alone in the devastated world of 2055, watching archive footage from 2008 and asking why climate change wasn't stopped before it was too late.
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Learn the basic science of climate change in 24 easy steps.