Summertime often triggers nostalgic memories, such as a long-ago cross-country family vacation or songs sung at a summer camp from one's youth. When these memories spring to mind, they can overwhelm ...

Nostalgia sneaks up on you. One moment, you're mindlessly scrolling; the next, a blurry photo, a TV theme song, or a forgotten memory blindsides you. All of a sudden, you're smiling, maybe tearing up, ...