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Nature
African Wild Dogs Vote with Sneezes
How does a pack of African wild dogs make the decision that it is time to hunt? One study found that packs vote on a hunt by sneezing.
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53:13
Powerful winds affect Antarctica's climate and topography.
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54:03
The technology scientists use to probe the planet and how it improves knowledge of nature
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54:04
How humans have tried to harness nature, from use of fire to the building of nuclear bombs
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53:49
The influence the sun and moon have on the seasons and the tides.
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54:04
The importance of the atmosphere and the oceans both in creating and destroying life
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54:04
The origins of the solar system and life on Earth; how life is affected by nature
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53:43
Scientists teach a gorilla to use sign language to communicate with them.
Owners relate tales of feline courage, stamina, resourcefulness and loyalty.
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53:54
Learn about the incredible wilderness of the Serengeti.
26:15
The Grand Canyon's terrain ranges from conifer forest to desert.
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47:52
Dogs aid the disabled, do dangerous military work, find humans buried by avalanches
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53:49
Meet those well-loved, well-dressed flightless birds.