Saturday Citations: An exoplanetary biosignature; the diplomacy of body odor; personalities of bees

This week, the Curiosity rover found large carbon deposits on Mars, suggesting an ancient carbon cycle. Researchers exploring the domestication of cats believe they may have originally pounced out of Tunisia. And researchers in Michigan report that during the shift of Earth’s magnetic pole 41,000 years ago, Homo sapiens may have protected themselves from harmful solar radiation with technologies including clothing, shelter and prehistoric sunscreen.

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