Even before the COVID-10 pandemic swept the globe, the United Nations agency has spent years researching and preparing for the next wave of deadly diseases. Here’s what to know about Disease X ...

If you see a referee hold up a "X" symbol above their head with their arms, it means a wrestler has been injured in the ring and the match needs to come to a stop before its pre-determined conclusion.

One such symbol that has intrigued users and sparked curiosity is the X, a seemingly simple yet enigmatic mark that holds a deeper meaning within the Twitterverse. At first glance, the X symbol ...