Nitzan Gonen, who studies sex determination at Bar-Ilan University in Ramat Gan, Israel, and her colleagues show that modifying both copies of Enh13 in female mice causes them to develop male genitals and small testes.

A sweeping analysis of sleep duration and signs of ageing in half a million adults has pinpointed a sweet spot — about six to eight hours of sleep each day — that is linked to a lower risk of early death and disease.

post massage urine sample

Reviewer 2 ought to be satisfied with our response, unless they wish to remain willfully ignorant, which unfortunately we cannot rule out