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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.
Ngày phát sóng đầu tiên : Sep 10, 1993
Ngày phát sóng cuối cùng : Jun 20, 1998
Tập phim : 100 Tập phim
Mùa : 5 Mùa
Thời gian chạy: 26 phút
Studio: PBS
Quốc gia: United States of America