Say farewell to memes taking over your Instagram feed. Instead, a new trend is popping up: videos of putty, slime, paint, and other materials being mixed, touched, cut, or pinched. If you watch one of ...

When scientist Giulia Poerio was a little girl, she says she would experience this very peculiar — and distinct — feeling: "a warm, tingling sensation that starts at the crown of the head, almost like ...