In 2016, University of Florida researchers stored ripe tomatoes at 5 °C (41 °F) for a week. The result: a sharp drop in the volatile compounds that make up their aroma, linked to the silencing of genes involved in producing them. One to three days back at room temperature wasn't enough for a full recovery. Better to keep them in a bowl on the counter and eat them soon.
Chlorine on its own is fairly gentle. But when it combines with urine, sweat and other grime from swimmers, it forms chloramines, which cause stinging eyes and that classic 'chlorine smell'. A well-kept pool barely smells at all. Shower before you swim and never pee in the water.
Muscle mass slowly shrinks with age, putting independence at risk. But in 1990, a study had nursing home residents aged 86 to 96 train their legs for eight weeks: their strength more than doubled. Muscle responds to training at any age. Getting up from a chair without using your hands is already an exercise.