Modern Marvels
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| Date (↓) | Episode # | Title | Network | Rating | Share | Viewers | Watch/Purchase DVD/Download |
|---|---|---|---|---|---|---|---|
| Observatories: Stonehenge to the Space Telescopes | History |
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| Oakland Bay Bridge | History |
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| Nuclear Subs | History | ||||||
| Nordhausen | History | ||||||
| NORAD | History | ||||||
| Non-Lethal Weapons | History | ||||||
| Niagara Power Plant | History | ||||||
| Newspapers | History | ||||||
| New York's Water Systems | History | ||||||
| New York Bridges | History | ||||||
| Nature's Engineers 2 | History | ||||||
| Nature's Engineers | History | ||||||
| Nature's Engineering | History | ||||||
| Nature Tech: Tsunamis | History | ||||||
| Nature Tech: Lightning | History | ||||||
| Nature Tech: Hurricanes | History | ||||||
| Nature Tech: Avalanches | History | ||||||
| Mummy Tech | History | ||||||
| Mountain Roads | History | ||||||
| Mount Rushmore | History |
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| Motors (a.k.a. Engines) | History | ||||||
| Motorcycles | History | ||||||
| Motion Pictures | History | ||||||
| Most Shocking | History |
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| More Snackfood Tech | History | ||||||
| More of the World's Biggest Machines | History | ||||||
| More Gadgets | History | ||||||
| More Earthmovers | History |
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| More Doomsday Tech | History | ||||||
| More Dangerous Cargo | History | ||||||
| More Bond Gadgets | History | ||||||
| Monumental Statues | History | ||||||
| Monster Trucks | History |
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| Money | History | ||||||
| Mining History | History | ||||||
| Mines | History | ||||||
| Million Dollar Tech | History | ||||||
| Milk | History | 
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| Military Movers | History |
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| Metal | History |
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| Medical Imaging | History | ||||||
| Map Making | History | ||||||
| Mail Delivery: Erasing the Miles | History | ||||||
| Magnets | History | ||||||
| Maginot Line | History |
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| Mad King: Ludwig's Castle | History | ||||||
| Mad Electricity | History | |
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| Mackinac Bridge | History | ||||||
| Machu Pidchu | History | ||||||
| Machine Tools | History |
