crisis
The critical tech staying safe by going underground
Archived — last updated
EarthGrid's plasma‑torched tunnel‑boring machine cut through three metres of granite in a California quarry test. Its three torches produce a super‑heated plasma stream at about 27,000 °C, hotter than the Sun’s surface, and spin to create…
Latest updates
No updates on this story yet.
AI-assisted summary of the reporting above. Quotes are kept to one sentence. Copyright concern? See our DMCA takedown page.