Incorporated Research Institutions for Seismology
Iris: Layers of the Earth What Is the Moho?
This animation discusses the history of the discovery of the Mohorovicic Discontinuity, as well as the logic behind it. Spoiler Alert: It is about Snell's Law. [9:22]
Wisc-Online
Wisc Online: The Sense of Sight
Describes the important structures of the human eye and how they work so that we can see images. [4:47]