Mars' core is smaller than we thought, and an anomalous liquid layer was identified at the top of the Martian core, by combining ab initio simulations performed on supercomputers and seismic data from Mars. The story was covered by ETH news, 环球科学 (Chinese version of Scientific American), among others.
Nature Reviews Earth & Environment Research Highlight, "Smooth transitions in a magma ocean." by Erin Scott.