Fusion power, typically associated with vast facilities complete with lasers and magnets, has been quietly miniaturized by a startup in Cambridge, Massachusetts. Co-founder and CEO Yun Kai has been showing off a tabletop version that could revolutionize the industry.

The device, despite its small size, is designed to conduct up to 80 experiments a day, allowing rapid iteration and refinement. This nimble approach has attracted significant funding, with a recent $6.2 million seed round from various investors.

Unlike other inertial confinement designs, Cambridge Heavy's reactor uses just two main lasers to compress a fuel target, achieving fusion with relatively low laser power. This design could be scaled up to power plants, but first, it aims to generate tritium, a rare isotope crucial for fusion reactions, in smaller-scale devices.

With the potential to produce energy without the massive infrastructure of current facilities, this compact fusion reactor could offer a more accessible and sustainable path to clean energy. But first, it must prove its worth in larger-scale designs.