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Nature
Watch a Protective Mother Hippo Guard Her Baby
Weighing only 4% as much as an adult, a baby hippo is completely dependent on its mother. The pair stays isolated from the rest of the pod, allowing the calf to imprint on his mother and for the two to forge a vital bond.
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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.