Nobody knew what they are, and whether they are only a temporary phenomenon, or if they have been sitting there for millions ...

The "Eye of the Sahara" — also known as the "Eye of Africa" or the Richat structure — is a giant rock dome ... myth of Atlantis — a "lost" island subcontinent idealized by some as an ...

and the significance of the nearly 900 giant moai that punctuate Easter Island's barren landscape. The moai and ceremonial sites are along the coast, with a concentration on Easter Island's ...