For starters, the swastika X—or cross—has come to symbolize the very essence of evil. And the letter, as signified by the skull and crossbones, portrays death by poison. Yet it also represents virtue ...

In July, inventor-entrepreneur Elon Musk gave his social-media platform Twitter a new name: X. Why? “I like the letter X,” Musk posted on the newly branded site. If X ever goes public, Musk may have a ...

The letter “x” often symbolizes something unknown, with an air of mystery that can be appealing. Illustration by Meilan Solly Even though “x” is one of the least-used letters in the English alphabet, ...

Peter Schumer does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...