This Drone Would Swim Through Lava—if Someone Could Build It
Which part of earth haven’t we explored yet? One hint: It’s by far one of the biggest places on the planet. It is, of course, the earth’s mantle, sitting just beneath a relatively thin crust of rocks. To develop a vehicle capable of clawing into the heart of our planet, start by designing and testing such a vehicle in lakes of lava near volcanoes. That’s what the Vulcan concept is about. Lava can range in temperature from 1,500 to 2,300 degrees Fahrenheit, so the Vulcan would need an outer shell…
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