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This educational science program features the story of Dr. Alfred Clothear and his discovery of how bears know when to sleep for the winter. |
Byron B. Blackbear and the Scientific Method1/1/1980Imdb: tt1473347Tmdb: 995388Popularity: 0.182Vote: 0/10 (0) |
This educational science program features the story of Dr. Alfred Clothear and his discovery of how bears know when to sleep for the winter. |