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What is the brain?

The brain is one of the most mysterious organs in the human body. Dr. Kaitlyn Casimo, an education and engagement manager at Allen Institute, shares the basics of the brain including its parts, regions, and diversity.

By Madeline Burchard, M.Sc. / Allen Institute

03.11.2025

1 min read

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Have you ever wondered: what is the brain? Where does it begin and end? What’s it made of, and how does it differ across species? Hear from neuroscientist and education expert, Kaitlyn Casimo, Ph.D., M.Ed., in this engaging video as she explores these questions with Madeline Burchard, M.Sc., a science communicator. Dr. Casimo breaks down the incredible complexity of the brain, its main regions and parts, brain differences between animals, and more fun facts.

Science Programs at Allen Institute