Tập
Modern Marvels: Episode 18
Tóm tắt
Does anybody really know what time it is? Set your clocks as we explore the relativity of time from antiquity–when man attempted to chart time with methods ranging from shadows, candles, and water–to today’s atomic clock system–accurate to within one second every two-million years.
Chi tiết
- Phim bộ
- Modern Marvels
- Mùa
- Mùa 6
- Tập
- Tập 18
- Ngày phát sóng
- 1999-02-22
- Thời lượng
- 44 min
Thông tin tập
Episode 18 là tập 18 trong Season 6 của Modern Marvels. Tập này phát sóng ngày 1999-02-22. Thời lượng là 44 min.
Tập trước / tập sau
Tập 17
Through rain, snow, heat, or gloom of night, we expect postmen to deliver the mail. The U.S. Post Office handles over 603-million pieces of mail daily. Yet it represents only 43% of the world’s total mail volume. From ancient Sumerians to Pony Express, from airmail to E-mail, we follow the long journey of mail.
Tập 19
First there were balloons and blimps. Then, visionaries enlarged, reinforced, and motorized them and the airship was born. The biggest aircraft ever flown, they remain one of the most romantic aerial creations. In all, 161 rigid airships were built before spectacular crashes, including the EM Hindenburg /EM , put an end to the era.
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Tập 20
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Tập 15
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Tập 21
Throughout history, the builders and engineers who paved our way out of the caves and into the modern world have also caused some of our worst disasters. What happens when their calculations prove wrong and it all comes tumbling down? From Hammurabi’s days, when the first building laws were instituted, to today’s potential nuclear or chemical disasters that can spell death for thousands, we’ll take a harrowing 2-hour tour through some of history’s greatest engineering mistakes.
Tập 14
From the earliest recorded account of an amputation and subsequent prosthesis in ancient Hindu writings, to a 16th-century fully articulated artificial hand controlled by an intricate geared mechanism, to today’s use of plastics and space-age materials, we chronicle the long history of prosthetic devices.
Tập 22
Even in ancient times, city dwellers needed a scenic break from the urban landscape. But parks play a more important role than mere relief from tension–they also keep temperatures down and supply much-needed oxygen in congested cities. Come along for a stroll through New York City’s Central Park and L.A.’s Griffith Park.
Tập 13
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Tập 23
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Tập 12
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Tập 24
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