Clare Duffy

Elon Musk is officially set to buy Twitter, and the company's employees have questions.

Some billionaires buy newspapers, magazines and sports teams. Elon Musk is trying to buy a social network that he himself admits might cause much of the world to hate him.

Ahead of its 2012 initial public offering, Facebook was in trouble. Its revenue growth was slowing, expenses were surging and it was falling behind competitors in the transition to...

CES, the closely-watched annual consumer electronics show, looked drastically different this year.