Biologist says cancers might actually be newly-evolved species inside your body

Biologist says cancers might actually be newly-evolved species inside your body: "We think of cancer as a disease, a form of runaway cell growth within an organism. But we might not have realized what cancers really are: separate, brand new parasitic species that evolve from and prey upon their human hosts.

That's the theory put forward by UC Berkeley biologist Peter Duesberg, who argues that the very act of carcinogenesis - the formation of cancer - is itself a form of speciation, in which distinct new species evolve. That may seem a little far-fetched, so let's take a look at Duesberg's precise reasoning to see exactly what's going on here."