Every now and then, a video pops up online that feels so calming you can’t help but hit replay, and this clip is no exception. It opens with Stella, a Labrador, gliding through a lake so calm it looks ...

The euphoric-but-relaxing responses to soothing visuals and quirky, textural sounds has spawned an online wellbeing phenomenon. But what is ASMR—and why do only some people feel it? Increasingly, ...