【“好奇号”发现古代咸水湖的证据 】【Curiosity rover finds evidence of Mars' ancient salty lakes】Since it landed on Mars in 2012 NASA's Curiosity rover has been exploring Gale Crater, a vast, dry ancient lake bed with a mountain at its center. Now, Curiosity has found sediments containing sulfate salt in the crater, which suggest it once held salty lakes. A range of salts have been found on Mars in different locations. Researchers interpret these as evidence of ancient brines. Salty water formations seemed to increase on the Martian surface as the planet transitioned to an arid climate 3.5 billion years ago. The new detection of sulfate salts came from sedimentary rocks dated to between 3.3 and 3.7 billion years ago. Curiosity has analyzed other, older rocks on Mars and didn't detect these salts in them.
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【还在打卡网红地儿吗？[傻眼]这个#俄罗斯网红湖泊有毒# 其实是化学垃圾堆】A bright blue lake nicknamed the “Novosibirsk Maldives” in the Siberian city of Novosibirsk, Russia, has long been a tourist sensation as well as a perfect backdrop to people's Instagram posts. However, the blue is due to dissolved calcium salts and other metal oxides, which can cause allergic reactions or even chemical burns if touched or ingested, according to the Siberian Generating Company, operator of the nearby power plant. So far, the company has deployed guards to keep trespassers at bay, but insists the lake presents no environmental danger. (Photo via AP)