New discoveries like Gobekli Tepi and Gunung Padong have added to Hancock's contention that there could have been a high civilization in the past. I like the fact that he is on more solid footing knowing that we have good evidence for a cometary impact that kicked off the Younger Dryas. While this subject will necessarily be speculative, Hancock has dug up a lot to bolster his argument. This was an interesting read.