Earth’s a medium-size rock with some water on top, enveloped by gases that keep everything that lives here alive. Just at the edge of that envelope begins a thin but dense layer of human-built, high-tech stuff. People started putting gear up there in 1957, and now it’s a real habit. Telescopes look up and out…
Rodatherm Energy emerged from stealth with $38 million in Series A funding. It plans to build a closed-loop geothermal power plant that uses refrigerants to move heat to the surface.