Which branch of science is the deadliest? Alex "Sandy" Antunes of Science 2.0 compared the three most murderous fields of science: physics, chemistry, and biology.
Pulling out real world statistics, we look to the Center for Disease Control (CDh). In 2007 (their most recent complete survey), we find that the bulk of the 2,423,712 US deaths were due to three causes: heart disease, cancer, and stroke.
Damn, looks like Biology takes an early lead. Those 3 causes alone cover over half of all deaths (54.2%) In fact, of the 15 leading causes, 9 of them are simple biology, causing 68.2% of all deaths. Disease and infection rule the land of the dead.