  We have observed the oxygen-rich SNR 1E 0102.2-7219 with the integral field
spectrograph WiFeS at Siding Spring Observatory and discovered sulfur-rich
ejecta for the first time. Follow-up deep DDT observations with MUSE on the VLT
(8100 s on source) have led to the additional discovery of fast- moving
hydrogen as well as argon-rich and chlorine-rich material. The detection of
fast-moving hydrogen knots challenges the interpretation that the progenitor of
1E 0102 was a compact core of a Wolf-Rayet star that had shed its entire
envelope. In addition to the detection of hydrogen and the products of
oxygen-burning, this unprecedented sharp (0.2" spaxel size at ~0.7" seeing) and
deep MUSE view of an oxygen-rich SNR in the Magellanic Clouds reveals further
exciting discoveries, including [Fe xiv]{\lambda}5303 and [Fe xi]{\lambda}7892
emission, which we associate with the forward shock. We present this exciting
data set and discuss some of its implications for the explosion mechanism and
nucleosynthesis of the associated supernova.
