Elon Musk says his $33-billion sale of X to an AI company he also owns will make his social media platform an accelerator for "human progress." ...

Some are predictable picks for their roles, most are not. Meet the people you’ll be seeing a lot in the next three years.

This new propulsion system could rewrite the rules of spaceflight—not to mention completely defy conventional physics.

Hurtling through the sky, with nothing below you, apart from 40,000 feet of thin air may feel like a dangerous place to be, but when it comes to traveling in a commercial airplane, it’s by no means ...

The P/B ratio shows how a stock's market price compares to its book value. It helps gauge whether a stock is undervalued or overvalued relative to its net assets.