I'm a huge fan of history.That was my favorite subject at school.Gobekli Tepe is really old and mysterious and there's a lot yet to be discovered on that particular region.Anyway,I don't trust Graham Hancock,he's just a man with huge fantasy,not a scientist(historian or archaeologist).More like a writer and journalist.
You don't really need to trust him, but some of his theories got confirmed so it's quite interesting.
A 19-mile wide impact crater was discovered half a mile beneath a Greenland ice sheet, offering scientists and archeologists proof that a mile-wide meteorite impacted the planet’s northern ice cap more than 12,000 years ago.
The discovery appears to support a contentious theory proposed by researchers, including Graham Hancock and Dr. Robert Schoch, who believe such a cataclysmic impact may have wiped out a lost civilization that predated the accepted timeline of mainstream archeology.
Source GaiaSame with the fight between Dr. Zahi Hawass and Robert Bauval it's also entertaining.
BTW have you heard of the hidden shafts and chambers in the sphinx?
This is also a great conspiracy, only Zahi has been down there but he refuse to release any information of the finding there >