In 2004, the Exploratorium launched the most ambitious microscope facility ever created for use by the general public, the Microscope Imaging Station. The project gives museum visitors the ability to view living specimens, as well as control the microscopes themselves to change the magnification, focus, and even the lighting. The project’s companion web site reflects the diversity of topics and specimens that users might see on a typical visit; its goal is to recreate some of the excitement and wonder that the earliest biological researchers found as they discovered another world all around them. Through images, text, and video, visitors to the site can learn about blood cells, stem cells, what happens when the immune system goes awry, how the zebrafish is helping biomedical researchers understand how our hearts function, and how the sea urchin helps scientists understand such topics as genes, reproduction, and cancer.