Feeling sluggish and sad during dark, dreary winter days? Seasonal affective disorder (SAD) could be to blame. Symptoms of SAD mirror those of regular depression: social withdrawal, changes in appetite and weight, low energy, and difficulty sleeping. Why? Shorter days and a lack of sunlight cause a dramatic dip in serotonin, the body’s natural mood stabilizer. For those days when you’re stuck indoors, Paul Verhaeghen, professor in the School of Psychology, recommends the next best thing: a light box or lamp with 2,500 to 10,000 lux. Use it for up to one hour per day — preferably first thing in the morning — to simulate natural sunlight and increase energy.
Atlanta Magazine, Jan 24, 2022
Between the low supply of, and high competition for, some key nutrients like nitrogen in the open ocean, scientists have puzzled over the vast diversity of microbial species found there. Researchers from 13 institutions show that time of day is key, according to a study published in Nature Ecology & Evolution. Georgia Tech collaborators for the study include Joshua Weitz, Professor and Tom and Marie Patton Chair in the School of Biological Sciences; Daniel Muratore, a doctoral candidate in the Quantatative Biosciences program, and Rogelio Rodriguez-Gonzalez, a graduate student in the School of Biological Sciences.
Phys.org, Jan 21, 2022