10 ft high might be an exaggeration but there is a growing body of research shedding light on genetic lineage within European and East Asian populations to long extinct hominids that predate (and disprove) the "Out of Africa" theory on human migration. Separately, there's a theory picking up speed arguing that approximately 12-11 thousand years ago, A cataclysm caused a 2-mile high ice sheet to melt in a relatively short amount of time. The resulting flood caused the worlds oceans to quickly rise, washing away any trace of a once ancient & advanced civilization and causing a reset for all human society. These accounts may be shreds of a once great and global civilization that is now nothing more than genetic remnants within present-day Europeans & Asians.