During sleep, your sense of smell stops working as an alarm: the smell of smoke is not enough to wake a sleeper. And in a house fire, most victims die from smoke inhalation, often before they ever see a flame. That's why, since March 2015, every home in France must have at least one smoke alarm. Test yours regularly: its piercing beep is what will actually wake you.
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.