Later the theory of concave hollow Earth was also advocated.

后来凹空心地球理论还主张。

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The Hollow earth - Dr. Raymond Bernard tells stories about people who have entered the inner earth and what has happened to them.

空心地球-雷蒙德·伯纳德博士讲述有关人们进入地球内部以及向他们所发生的故事。

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The scientific community does not shore up the theories however many supporters did roll out their hypothesis over the hollow earth.

科学界不托理论然而，许多支持者也推出了自己的空心地球的假说。

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Once we spent the holidays high up in the Swiss Alps, where my body stiffened at the sight of deep hollow chasms emptied out of the rocky earth.

NEWYORKER: Naima