by Jerry Bergman, Ph.D., and Jeffrey Tomkins, Ph.D.

In M. Horstemeyer, ed., 2013, Proceedings of the Seventh International Conference on Creationism, Pittsburgh, PA: Creation Science Fellowship. Visit the ICC at www.creationicc.org.

Scientists now say that the petroglyphs at Pyramid Lake, Nevada, are the oldest in North America to have been age-dated. Though appearing confident about some details, they cannot yet identify the ancient peoples who carved those rocks. But the ancients did possess one characteristic that surprised secular scientists.

The onset of pregnancy presents an apparent contradiction. Ovulating and initially pregnant mothers experience an increase in progesterone. On the one hand, this hormone signals the immune system to back down and lay low. That's critical, because otherwise her body would fight and kill sperm cells as though they were unwelcome invaders, and she would never become pregnant.

The human Y-chromosome has been a sore point among secular scientists in recent years because of its many anti-evolutionary surprises. Adding to the Darwinian grief, is yet one more shocking Y-chromosome study that more clearly illustrates the boundaries of human genetic diversity.