Reprinted from The Washington Post
Blood has many roles in the metaphorical life of the human body. It’s the organ of kinship (“blood ties”), the seat of emotion (“blood lust”) and a vehicle for identity (“travel is in his blood”). But might it also be a window on the body’s fate?
Many scientists are trying to answer that question as a practical matter, not a metaphor. They are scouring the blood for biomarkers — easily measured substances that illuminate what’s going on in hard-to-reach places. read more