Most of us eventually arrive at a point in life where we ask, "Is this it?" For some of us, it's a turning point; for others, it's a sort of nagging sense that things might have been different had we ...

The human genome is made up of 23 pairs of chromosomes, the biological blueprints that make humans … well, human. But it turns out that some of our DNA — about 8% — are the remnants of ancient viruses ...