The clock may be running out for TikTok. Or maybe not just yet ... Among the possibilities: It could "go dark." It could go dark for just a day. Or it could remain up and running, at least ...

18 (UPI) --Time ran out to keep TikTok in business in the United States. The highly popular video-sharing platform, owned by a Chinese-based company deemed a U.S. security threat, went dark around ...

You'll have to start logging miles in the dark ... share your real-time location and route with your running group. You might be tempted to throw in some headphones and zone out.