Muons penetrate much further than X-rays, they do essentially zero damage, and they are provided for free by the cosmos.
Image credit: Science Source/Digital Globe.
See allHide authors and affiliations
Edited by Marcus E. Raichle, Washington University in St. Louis, St. Louis, MO, and approved October 4, 2011 (received for review July 22, 2011)
Files in this Data Supplement: