The human eye is an amazing mechanism, able to detect anywhere from a few photons to a few quadrillion, or switch focus from the screen in front of you to the distant horizon in a third of a second. How did these complex structures...

The focus of this site is the anatomy of the eye. The site include diagrams and slides showing details at the light microscope and electron microscope level.

John Winthrop's "Model of Christian Charity" was delivered as a sermon aboard the Arabella, as the Puritans approached their destination of Massachusetts Bay in 1630. The speech spells out his vision of the society they hoped to create...

Part of an online exhibit on bats, this section focuses on bat senses: sight, olfaction (smell), echolocation, and hearing.