A new study finds that adults who consume the equivalent of one diet soda’s worth of artificial sweetener every day might experience accelerated cognitive decline. Researchers note a 62 percent faster drop in memory and sharpness compared to those who consumed far less.

They travel south of Kampsbaai, retracing the place where their story began. Along the road, towns like Llandudno and Kommetjie guide them deeper into the lesser-settled part of the peninsula, toward an old coastal landmark beyond its lighthouse.