Melinda Sims pulls more power from land fills
Build eyewear that flips your perspective around
Brian McNamara makes and sells custom synthesizers
Michael Aziz finds alternatives to scarce materials
And even more lurks below the surface
Leslie Dewan and Mark Massie are reviving the nuclear dream
Blowing them up is someone else's job
A secret, hypersonic replacement for the legendary SR-71 promises to transform military aviation
Larry Baxter cleans up after power plants with cryogenics
Gregg Semler turns tiny turbines into mighty generators
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