Nuclear startup X-energy hit the road today to sell prospective investors on its initial public offering.

In a first, the U.S. Energy Information Agency said it will require data centers to disclose details of their energy use.

Inertia has signed three agreements with the Lawrence Livermore National Lab, paving the way for the company to bring its pioneering fusion reactor to market.

Ascend Elements said that it will be filing for Chapter 11 bankruptcy in the wake of a canceled government grant and a challenging market for lithium-ion batteries.

Fusion startups have raised $7.1 billion to date, with the majority of it going to a handful of companies. 

Merino Energy has simplified the heat pump dramatically in a quest to make them cheaper and easier to install.

Meta, Microsoft, and Google are all betting big on new natural gas power plants to run their AI data centers. They may regret it.

A new poll shows that the debate over data centers is far from settled.

Realta Fusion is buying magnets from Commonwealth Fusion Systems, providing a revenue stopgap.

Meta's upcoming Hyperion AI data center will be powered by 10 new natural gas plants.

Fusion, fission, and even natural gas are appeared tied in the race to deliver new power to the grid in the early 2030s.

Senators Josh Hawley and Elizabeth Warren want the Energy Information Administration to gather more details about how data centers use power — and how that affects the grid.

Startup Epoch Biodesign uses enzymes to break plastic waste down into monomers, the chemical building blocks that can be used to make new plastic.

Form Energy and Redwood Materials both received orders from the data center developer.

OpenAI CEO Sam Altman is stepping down as board chair of Helion. His departure comes as reports that the two companies are negotiating a deal that would see Helion sell 12.5% of its power output to OpenAI.

Fusion power promises to generate large amounts of clean electricity from nearly limitless fuel. This article explains the main approaches and the companies that use them.

Power has become one of the biggest bottlenecks in rolling out new AI data centers. That's creating an opening for investors.

Fervo landed a large new loan with terms that strongly suggest the company's most turbulent days are behind it.

Google has long procured clean power for its operations and data centers, but recent deals show the company is changing tactics.