NASA's Aqua satellite captured an infrared image of Cyclone Phet on June 3 at 08:59 UTC (4:59 a.m. EDT). The purple in the image indicates strong thunderstorms with high, cold cloud tops as cold ...

Kathy is the director of the PhET Interactive Simulations Project and Director of CU's Science Education Initiative. She is also an Associate Professor Attendant Rank in Physics, specializing in PER.

PhET provides fun, free, interactive, research-based science and mathematics simulations. We extensively test and evaluate each simulation to ensure educational effectiveness. These tests include ...