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Modern Marvels Season 6 Episode 41

Forts

The art of fortification evolved along with man’s need to defend his territory from attack. There was no other reason. From hills surrounded by branches and crude fences to intricate walled cities, to impenetrable castles – the strongholds of the past echo the history of great battles for territorial control.

Oct. 25, 1999

6 - 48
Lost MarvelsDec. 14, 1999
6 - 47
Casino TechnologyDec. 13, 1999
6 - 46
Niagara PowerDec. 08, 1999
6 - 45
More Engineering Disasters.Nov. 29, 1999
6 - 44
Security SystemsNov. 16, 1999
6 - 43
MotorcyclesNov. 15, 1999
6 - 42
Emergency RoomNov. 08, 1999
6 - 41
FortsOct. 25, 1999
6 - 40
More Earthmovers.Oct. 18, 1999
6 - 39
The Tool Bench: Hand ToolsOct. 13, 1999
6 - 38
The Tool Bench: Power ToolsOct. 12, 1999
6 - 37
SimulatorsOct. 11, 1999
6 - 36
FireworksSep. 27, 1999
6 - 35
NewspapersSep. 13, 1999
6 - 34
ParachutesSep. 06, 1999
6 - 33
Crash TestingAug. 31, 1999
6 - 32
New York BridgesAug. 23, 1999
6 - 31
Baseball ParksAug. 09, 1999
6 - 30
Hoover Dam.Aug. 02, 1999
6 - 29
Dynamite.Jul. 20, 1999
6 - 28
Offshore Oil DrillingJul. 19, 1999
6 - 27
Scuba And Deep Sea DivingJul. 12, 1999
6 - 26
Rescue EquipmentJul. 06, 1999
6 - 25
U.S. Mints: Money MachinesJun. 21, 1999
6 - 24
Battlefield MedicineMay. 25, 1999
6 - 23
Spy TechnologyMay. 01, 1999
6 - 22
City ParksApr. 26, 1999
6 - 21
Engineering DisastersMar. 30, 1999
6 - 20
Physical FitnessMar. 15, 1999
6 - 19
Airships.Mar. 09, 1999
6 - 18
ClocksFeb. 22, 1999
6 - 17
Mail DeliveryFeb. 08, 1999
6 - 16
StereosJan. 25, 1999
6 - 15
Weather PredictionJan. 01, 1999
6 - 14
ProstheticsDec. 28, 1998
6 - 13
BombsDec. 23, 1998
6 - 12
Extreme Sports GadgetsDec. 16, 1998
6 - 11
Medical ImagingDec. 07, 1998
6 - 10
PlasticsNov. 23, 1998
6 - 9
The Police CarNov. 09, 1998
6 - 8
Antibiotics: The Wonder DrugsNov. 03, 1998
6 - 7
Monumental StatuesOct. 28, 1998
6 - 6
The Oakland Bay Bridge.Oct. 12, 1998
6 - 5
Las Vegas Hotels.Oct. 06, 1998
6 - 4
AquariumsSep. 28, 1998
6 - 3
History of Tall BuildingsAug. 24, 1998
6 - 2
The Atlantic WallAug. 03, 1998
6 - 1
DemolitionJul. 27, 1998