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High School Science

Take a tour of the sciences as seven award-winning professors introduce you to botany, physics, astronomy, and more.

Watch First Lecture

1 HS - Why Are Leaves Green? - 01 min

Dr. Catherine Kleier, Professor of Biology at Regis University in Denver, Colorado explains why leaves are green, what photosynthesis is, and provides an overview of the anatomy of a leaf. With accessible explanations and helpful illustrations, this lesson introduces concepts of biology and botany in a fun new way....