It takes a lot more than adding wind turbines and solar panels to transform a giant power grid.
Tackle this brain teaser with a vengeance.
These polygons contain multitudes.
They trick your brain into making your tummy rumble.
Color constancy is playing tricks on you.
Are we done yet?
The rarest blood is blue.
Sunlight, fire, and even a hand crank can pump juice into your device in a pinch.
There's always room for one more.
Skilled fixers still service everything from cameras to denim.
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