Microscopic time-lapse footage which displays pigment epithelial cell activity in the retina of a rabbit's eye. John Nash Ott incorporated the film...
This film documents the four stages of a butterfly's life cycle: egg, larva, pupa and adult butterfly.
Defines vitamins, how they work in the human body, and the foods which contain various vitamins. Debunks many myths about vitamins and explains the...
Shows the factors required by green plants for life and growth: sunlight, carbon dioxide, water, and soluble minerals; and describes the process of...
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