Modern Marvels: Nature's Engineers: Busy as a beaver is no exaggeration--particularly if those beavers are the ones who built a half-mile long dam in Three Forks, Montana. The industrious mammals are no lock for the title of natures best builder, however. Termite mounds in Africa... (more details for Modern Marvels: Nature's Engineers)

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File by D. Hoshaw (#2946)
2016-03-10 Grade: 9-10
File by D. Hoshaw (#3096)
2017-03-03 Grade: 9-10