Costa Rica's Radical Rocket

Getting to Mars' or anywhere else in the solar system-may be easier with Ad Astra Rocket Co.'s plasma thruster

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Photo: Randi Silberman
FOOD FOR THOUGHT: Ronald Chang Díaz [third from left], is Franklin’s younger brother and in charge of the heat management lab. He handpicked his team of electrical engineers and set up the facility in Costa Rica from scratch. “We’re like a family here,” he says.
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