Menopause: men are to blame

According to the research, it seems men's preference for younger women means there is no reason for older women to remain fertile and menopause is the evolutionary consequence.

Menopause is almost unique to humans, with whales and some chimpanzees the only others affected, the authors said.

Theories for this abound. One suggests that women evolved to become infertile after a certain age to increase their children's survival chances. Another says it's so they can help rear