基尔·斯塔默。图片来源:Benjamin Cremel / Reuters
As the moon rises tonight, the daughters of Artemis II leader Reid Wiseman can gaze skyward, feeling a profound connection to both their parents orbiting above.
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The reason a nautiloid managed to masquerade as an octopus for almost a quarter of a century was due to the way that fossils from the Mazon Creek Lagerstätte formed. Around 300 million years ago, this area was a brackish, tidal marine basin that was periodically inundated by massive amounts of iron-rich river mud. When organisms died and were buried in this sediment fan, the high iron content triggered the precipitation of the mineral siderite around their decaying bodies, locking them inside hard geological nodules.
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