Scienceblogtwo

The September equinox marks the start of the fall season for the Northern Hemisphere, which is accompanied by colder weather and changing foliage. The autumnal or spring equinox for 2022 takes place on September 22 at 8:04 p.m. CDT (depending on which hemisphere you are in). According to Alphonse Sterling, an astronomer at NASA's Marshall Space Flight Center in Huntsville, Alabama, the Sun shines directly over the equator during an equinox. According to him, this leads to almost equal amounts of day and night everywhere on earth, with the exception of the North and South Poles, where the Sun roughly straddles the horizon for the whole of the day. The Northern Hemisphere gradually experiences later sunrises and earlier sunsets after the autumnal equinox, lengthening daytime hours and shortening nighttime hours. The converse is true in the Southern Hemisphere, when the days start to get longer. An example of the spring (March) and fall (September) equinoxes. Both hemispheres experien...

Recent studies from Tel Aviv University show that women are not affected by sun exposure on their hunger levels, but males are. The study shows how the metabolic pathway is engaged differently in men and women. It was carried out utilizing lab models. Males of both animal and human species, as well as those exposed to the sun, are reportedly triggered to produce a protein called p53 that repairs any DNA damage that may have been done to the skin as a result of the exposure. The body produces the hunger-inducing hormone ghrelin in response to p53 activation. In females, the hormone estrogen stops p53 from interacting with ghrelin, preventing the desire to eat after being in the sun. The ground-breaking investigation was directed by professor Carmit Levy and Ph.D. candidate Shivang Parikh of the Department of Human Genetics and Biochemistry at TAU's Sackler Faculty of Medicine. In addition to the Tel Aviv Sourasky (Ichilov), Assuta, Meir, and Sheba Medical Centers, Drs. Yiftach Gepne...