But fusion aficionados also blame a lack of urgency for the slow progress, claiming that at least 15 years have been lost because of delays in decision-making and what they regard as inadequate funding.

ECONOMIST: A step towards commercial fusion power. Perhaps

Oesterle, 59, admits the back surgery field is "clouded by a lack of evidence, " even as he insists that fusion is effective for many patients.

FORBES: Neurosurgery