If you spend a lot of time on YouTube, you may have seen something called 8D Audio showing up in the Up Next column or in your recommended videos. 8D? As in eight-dimensional audio? Yes, it’s a thing.

Fans of "brain flossing" swear it helps them relax, sleep and concentrate. If you’ve been on TikTok recently, you’ve probably come across a curious-sounding trend called “brain floss.” Don’t worry — ...