BIOLOGY teachers are soon going to be confronted with the problem of bringing up to date text-books on a number of subjects, particularly those which have not previously been well presented to the ...

For a long time, having children has been a young person’s game. Although ancient records are sparse, researchers estimate that, for most of human history, women most typically conceived their first ...

At the same time, lower levels of male sex hormones, including testosterone, to oestrogens may have led to reduced competition between males while also improving fertility in females, thereby allowing ...