An international team of Earth scientists at Utrecht University in the Netherlands,
have developed a website called paleolatitude.org
that lets you select any location on the planet and see how its position has changed over the past 320 million years.
The site reconstructs the movement of Earth’s tectonic plates dating back to the age of the supercontinent Pangaea.
OpticsApplet v1.1This applet allows users to simulate standard optic elements (lens, mirror, dielectrics, sources, apertures) and observe the ways that light rays propagate through these elements.