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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.
Дата первого эфира : Sep 10, 1993
Дата последнего выхода в эфир : Jun 20, 1998
Эпизод : 100 Эпизод
Сезон : 5 Сезон
Время выполнения: 26 минут
Студия: PBS
Страна: United States of America
