Co-founder of The Metastabilian Movement. Artist ~ Scientist, Musician, Writer and Metastabilian Muse. Ph.D. Neuropharmacology, UCHSC. Since 1991, Engstrøm has worked with eminent neuroscientist J. A. Scott Kelso to develop conceptual links between Coordination Dynamics and Complementary Pairs. Kelso and Engstrøm co-wrote the book on the subject, The Complementary Nature (MIT Press, 2006). It presents a novel philosophy of complementary pairs grounded in the science of coordination called Coordination Dynamics. It also introduces a new name and meaning for the ‘~’ text symbol, the squiggle sign, which symbolizes the complementary nature of given pairs of complementary aspects; it also introduces “The Squiggle Sense” to mean a body~mind ‘sixth sense’ of The Complementary Nature.