There are continents to explore right below our feet — including two giant blobs 100 times as tall as Everest. Here’s how seismologist and geophysicist Ed Garnero is studying this unseen and largely uncharted territory.
对大多数人来说，他们对地球构成的全部认知，还停留在小学课堂上学到的内容：我们的星球由蛋壳般的地壳覆盖着厚厚的地幔，地幔之下包裹着一个超高温的地核。然而在过去十年间，科学家们取得了一些极为有趣——甚至匪夷所思、意义深远——的新发现，为这幅图景增添了诸多细节。他们近期在地下的发现包括：一条流速远超构造板块的液态金属之河、地壳与地幔交界处的”气泡”、一种能够在地幔数百英里深处储存水分的新型矿物，以及岩石被加热后像爆米花一样膨胀喷出的岩浆腔。
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