
Chemistry
Scientists Say: Rare earth element
Rare earth elements aren’t all that rare — but skyrocketing demand for these metals makes them precious.
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Rare earth elements aren’t all that rare — but skyrocketing demand for these metals makes them precious.
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Even when it’s pitch black, the new imaging system can create clear images while also accurately gauging distances to objects.
Dennis Hong and his team design human-like robots that can help solve problems and also entertain.
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Experts break down what’s possible and what’s not for this classic science-fiction invention.
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