Plant roots grow downward because the roots sense and respond to gravity through precise cellular mechanisms. What space flight does is to accelerate the speed at which these effects become apparent, thus providing researchers with a new tool to use in relevant studies. Yes, we are learning more about the origins of life by studying Martian rocks. These rocks offer glimpses into what the Earth may have looked like long ago. But whether the signs of microorganisms claimed to be found in Martian rocks several years ago are authentic still remains to be determined.
Studies show that the daily rhythms of people exposed to bright light can be easily modified.
Treatments borne out of this research should improve the lives of people with sleep disorders. Have you ever wondered . . .