Mark J. Stock is a scientist, programmer, and artist who creates still and moving images combining elements of nature, physics, chaos, computation, and algorithm. He focuses on works that can be created only with scientifically-accurate research software and methods---never commercial CG software---so he must either write the code himself or borrow it from researchers in their respective fields. Often, these codes have never been re-tasked for artistic purposes. His works explore the tension between the natural world and its simulated counterpart---the one created on supercomputers by scientists and engineers hoping to understand nature's mysteries. He has been showing work since 2000 and has been in over 50 curated and juried exhibitions since 2001, including Ars Electronica, ASPECT Magazine, and six SIGGRAPH Art Galleries. He has spoken at numerous scientific, graphics and art conferences and workshops, and has published papers in a variety of fields. Mark completed his PhD in Aerospace Engineering at the University of Michigan in 2006 and currently develops new computational methods for science, engineering and art clients. He spends most of his time in and around his home and studio in Newton, Massachusetts.