In 2001, when two separate organisations laid bare, for the first time, the DNA structure of our human genome, it revealed a deeply paradoxical truth.  Where we expected some 100,000 genes coding for the same number of proteins, just 1.5% of the DNA coded for just 20,000 proteins.  Meanwhile, almost half our DNA is viral -- with a genetic structure very similar to the genome of HIV-1, the viral cause of AIDS.  What does this mean?  In Virolution, for the first time in any published book, Frank Ryan reveals the remarkable story.