Rock Collection is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV ...
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Cool rocks: NASA's Mars rover shows off its rock core collectionNASA's Mars rover Perseverance has a rock collection that would make any geologist jealous, and the space agency is giving a sneak peek at the rocks before the samples head to Earth. Perseverance ...
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