Do you sometimes walk to another room in your house to get something, but then can’t remember what it was you wanted? Do you sometimes forget about an appointment or struggle to remember someone’s name? You may have chalked these lapses in memory up to getting older. And age can indeed play a...

If you read most first aid guides, the last step in treating someone who’s gotten injured or sick is always: get the victim to professional medical help. But what if you found yourself in a situation where hospitals were overcrowded, inaccessible, or non-functional? What if you found yourself in...