How Did They Build That? | Subways & Sightlines

America in Color: Made in the USA

World's Biggest Spider Gobbles Down an Unsuspecting Lizard

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One of the Toughest Foes a Submarine Could Battle

The Training Regimen of NASA's First Astronauts

Smithsonian Channel

10 Dogs With Incredible Abilities

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