  We discover strange nonchaotic attractor (SNA) through experiments in an
unforced system comprising turbulent reactive flow. While models suggest SNAs
are common in dynamical systems, experimental observations are primarily
limited to systems with external forcing. We observe SNA prior to the emergence
of periodic oscillations from chaotic fluctuations. In complex systems,
self-organization can lead to order, and inherent nonlinearity can induce
chaos. The occurrence of SNA, which is nonchaotic yet nonperiodic in one such
complex system, is intriguing.
