According to R. Bernard, Byrd enigmatically referrs to the new and unknown land area he discovered beyond North and South Poles, within the polar concavities; they are beheld here as "an enchanted continent in the sky" due to the well known polar phenomenon of "sky mirror" whereby land areas below are mirrored in the sky.
According to the Sumerian texts, the gods have established their spheres of influence before their arrival on Earth: Anu/ Yahweh was to stay in the Heavens and to rule over the Twelfth Planet, Enlil/ Jesus was to commend the lands (the Earth), and Enki/ Ea/ Azazel was put in charge of the "Deep waters", the "Lower World", the "Subterranean World", etc.
The temporary commend of the Earth wielded by Enki/ Ea/ Azazel was repeatedly acknowledged by Messiah Jesus/ Enlil almost 2000 years ago, saying about his brother:
"Now is the judgment of this world. The ruler of this world will be thrown out now." (John 12:31).
"The prince of this world now stands condemned." (John 16:11).
In His sacrifice of Himself on the Cross (the symbol of the Planets of Gods), as commanded by Yahweh/ Anu to spread the Truth about the Kingdom all over the world, Jesus/ Enlil proved to be "The Lord of the Command" and fulfilled his father's will. The Jewish prophets call him "the lamb" because he obeyed the orders received from Yahweh/ Anu. He is also prophesized as "the lion from the tribe of Judah" who will come and implement justice and peace on Earth. Later came the understanding that "the lamb" and "the lion" meant one name: Messiah Jesus/ Enlil. Enki/ Ea will obviously retire into the "Lower World".
Recent information about the hollow Earth can be found searching Google for "the holes at the poles" (the polar openings: the Nordic one with a diameter of 1400 miles and the South one with a diameter of 1300 miles). NASA took these images with the ESSA 3 and ESSA 7 satellites on January 6, respectively November 23, 1968. The following text accompanied the latter one: "The remarkable photograph taken by the ESSA 7 satellite on 23 November 1968. There is almost no cloud cover; the ice fields on the surface can be observed and the hole at the North Pole can be clearly seen."
"A huge ocean discovered inside the Earth… beneath eastern Asia that is at least the volume of the Antarctic Ocean..." The discovery was made by Michael Wysession, a seismologist at the Washington State University from St. Louis and Jesse Lawrence from the University of California, San Diego.
You can also follow the link www.ourhollowearth.com for various works, including R. Bernard's book.
Both the Antiquity's writings and NASA provide information about the hollow Earth:

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