Bill Nye the Science Guy

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Bill Nye the Science Guy - Season 5 Episode 10 에피소드 10

What do you get when you have a big hole in the ground and some water? Lakes and ponds. All lakes and ponds have one thing in common – they happen when a basin, or hole, forms, and then fills with water. A glacier may grind a long gulch, volcanoes and earthquakes may make a sinkhole, or engineers may build a dam – they can be human or beaver.


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26 의사록 1998 HD

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