Helium is the second most abundant element in the universe, but on earth it's in short supply. And Iran's retaliatory strikes on helium-rich Qatar have made it even more scarce. NPR's Ayesha Rascoe ...
Automation has made its way into restaurant kitchens. Planet Money looks at what the effects of automation have been historically — and watches a robot wok in action to see how it may change things.
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