2010年11月9日のブックマーク (5件)
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fujikumo 2010/11/09
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Fossils Could Be Found by Next Mars Rover, Study Hints
A new theory for how oceans formed on ancient Mars also hints at the best spots for future fossil hunts on the red planet. Based on the geology of Mars's northern plains, the new study suggests that bodies of water formed as groundwater slowly seeped through cracks in the crust. This process would have made oceans and lakes quickly—within just a few years—but also could have sustained the bodies o
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Giant Shrimp-like Sea Predator Was a Weakling After All
A shrimplike creature thought to be Earth's first great predator was actually more of a worm-eating wuss, scientists say. Anomalocaris canadensis glided along the seafloor about 500 million years ago, during Earth's Cambrian period. Nearly three feet (one meter) long, the shelled, bulging-eyed animal was giant compared to the other organisms living at the time. (See a prehistoric time line.) Its u
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