Zecharia Sitchin is Jewish Scholar whose knowledge of modern and ancient Hebrew, other Semitic and European languages is second to none. He has spent a lifetime studying the Old Testament and the history and archeology of the Near East.
Sitchin has researched and re-translated many of the ancient tablets from the most ancient cities of Sumeria, Babylon and Arcadia (now mostly in Iraq) and his revelations about the colonization of Earth by peoples from a Nibiru, a 12th planet in our solar system about 450,000 years ago have proved to be highly controversial in the scientific and religious world.
However, as fantastic as his theories might sound at first, the compelling evidence that he brings into play from the ancient documents that he has translated, chronologically verified in many ways by the Old Testament, are very logical.
Although ridiculed a lot by the scientific world when it was first published 30 years ago, Zecharia Sitchin's first book "The 12th Planet" and the subsequent books, collectively called "The Earth Chronicles" are now being taken more seriously.
So much has changed in the last 30 years in our knowledge of the ancient world. There are numerous documentaries on The Discovery Channel and History Channel covering new discoveries about the ancient world, not just the Greeks, Romans and Egyptians, but older civilizations that pre-date these, and every year new artifacts are being discovered, and we are being made aware of the deeper understandings of the technological levels of these peoples.
You can find more information on Zecharia Sitchin and his fascinating books at Zecharia Sitchin on Squidoo