America in Color: Made in the USA

One of the Toughest Foes a Submarine Could Battle

The Moment Lincoln Realized the Military Power of Railroads

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The Training Regimen of NASA's First Astronauts

World's Biggest Spider Gobbles Down an Unsuspecting Lizard

Smithsonian Channel

10 Dogs With Incredible Abilities

CUTE: These Hedgehogs Are Ready for a Return to the Wild