国内反战情绪高涨、盟友关系松动，美国增兵伊朗实属“进退两难”
Pohlsepia mazonensis, a visually underwhelming fossil from Illinois, fundamentally broke our understanding of cephalopod evolution. Described in 2000 and hailed as the oldest known octopus in the fossil record, the specimen dated back to the late Carboniferous period, roughly 311 to 306 million years ago. Pohlsepia was an outlier—all other fossil records strongly suggested that crown coleoids, the group containing octopuses, squid, and cuttlefish, diverged much later, during the Jurassic.，更多细节参见QQ浏览器下载
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