This Java applet allows users to interactively explore various specimens as they appear under a scanning electron microscope (SEM). Choose from a cockroach, pollen grain, a diatomic molecule, a gecko foot, a jellyfish, and more. Users first adjust the focus, contrast, and brightness of the specimen to optimize its appearance. Then they use a slider to incrementally increase the magnification up to 10,000x. It is part of a much larger collection of optics and microscopy materials developed at the National High Magnetic Field Laboratory at Florida State University.