(Heidi Ledford/ Nature) — In the chaos of the first months of the coronavirus pandemic, oncologist and geneticist Ami Bhatt was intrigued by widespread reports of vomiting and diarrhoea in people infected with SARS-CoV-2.

“At that time, this was thought to be a respiratory virus,” she says. Bhatt and her colleagues, curious  …

(Constance Summer/ New York Times) — The New Mexican desert unrolled on either side of the highway like a canvas spangled at intervals by the smallest of towns. I was on a road trip with my 20-year-old son from our home in Los Angeles to his college in Michigan. Eli, trying to be patient, plowed down I-40 as daylight dimmed and  …