Fusion startup Helion raised $465M, boosting its valuation to $15.5B. The company plans to use the funds to deliver ...

Fusion startup Helion is racing to complete a power plant for Microsoft by 2028. A fresh infusion of cash should help with ...

This company says its pulsed plasma machine will deliver electricity to the grid by 2029. Some physicists warn that its promises are outrunning what the technology has proved ...

Big Tech, governments and investors are backing nuclear again. The harder question is whether it can scale in time for the ...

Helion Energy, a nuclear fusion startup backed by OpenAI’s Sam Altman, still has to prove it can produce electricity to serve data centers and other customers. But investors seem confident it can ...

Whether you’re hitting Naples for vacation or Zurich for work, these are the pairs you need.

OpenAI CEO Sam Altman concluded his testimony in the Musk v. Altman trial in federal court in Oakland, California on Tuesday. Altman testified over the course of roughly four hour ...

Sam Altman told a California jury Elon Musk made 'hair-raising' demands to control OpenAI, including future control ideas. Musk is suing over its for-profit structure, seeking over $100B.

My husband travels more than anyone I know. He’s also a competitive athlete. Which means it’s completely normal for him to step off an overnight flight, head straight into a board meeting, and then ...

Sam Altman defended his investments in companies tied to OpenAI, but growing political scrutiny is raising questions about ...

The round will accelerate commercial deployment of fusion, scale manufacturing capacity, and expand the company’s ability to ...

A former Tesla designer's startup has won investment from Sam Altman and other top investors as money floods into physical AI ...