Tangent. In addition to rebranding Twitter and incorporating the letter X into both his space technology and electric vehicle companies, Musk also formed an artificial intelligence company earlier ...

In the 2012 TED Talk above, Terry Moore traces the use of the letter x in algebra to the Arabic word al-shalan, which means “the unknown thing,” claiming that, in translations of the writing ...

But if I must be labeled, X is the letter for me. We live in a time when so much of our language feels insufficient to describe the complicated world in which we find ourselves.