Physics vs. Biology
This classic What If from Randall Munroe of XKCD has me thinking today not of the Sun and the Earth, but of the DaRT and the Cancer tumor.
>"If you were standing in the path of the beam, you would obviously die pretty quickly. You wouldn't really die of anything, in the traditional sense. You would just stop being biology and start being physics."
Perhaps a DaRT is not "quite" so forceful, but it's fun to think about Cancer being reduced to some benign molecules.