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Nature

A Crystal Chalice

1:17

Male swiftlets use their own building material, gluey saliva, to make their nests. Constructed layer by layer along the cave walls, it can be weeks of painstaking work.

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Episodes of Nature39

Nature

Moose: Life of a Twig Eater

And intrepid cameraman spends a year documenting the life of a moose calf and its mother.

53:10

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Clips of Nature256

Nature

The 500-Pound Dinosaur Heart

The heart of a newly-discovered dinosaur may have weighed as much as a grizzly bear.

1:14

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Nature

Raising the Dinosaur Giant

Deep in a South American desert, a giant is being awakened after 101 million years of slee

0:41

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