Weizmann Institute molecular geneticist discovers what makes humans ‘tick’ and causes disruptions during menstruation, pregnancy, and menopause.
THE SUN sets behind the Houses of Parliament in London. It’s known that circadian clocks are affected not only by external signals such as sunlight but also by signals carried through the bloodstream. (photo credit: Hannah McKay/Reuters)ByJUDY SIEGEL-ITZKOVICH
