The Wild Life of Our Bodies

Another study found that Crohn’s disease is less common where tuberculosis is more common. It is also more common where it is colder and where days are shorter. But a correlation between two things is no guarantee that one causes the other.

But we also share most of our traits and genes with fruit flies, a fact upon which modern genetics depends for its succor and funding. We even have many genes in common with most bacteria, genes that exist in each of our cells.