Civilisation Backup

Shortly after Roman civilisation fell, the inhabitants of the area looked up at the aqueducts and wondered what the hell they were. Pat and Rod contemplated this and got talking about a way to backup civilisation so that surviving humans have knowledge to work with "after the fall". Show notes as follows: Younger Dryas http://en.wikipedia.org/wiki/Younger_Dryas Global Catastrophic Risks http://en.wikipedia.org/wiki/Global_catastrophic_risks The Wikipedia Data Set http://en.wikipedia.org/wiki/Wikipedia:Size_of_Wikipedia#The_data_set Foundation of Jericho http://en.wikipedia.org/wiki/Jericho Most Spoken Languages http://www.wolframalpha.com/input/?i=most+spoken+languages Students designing A-bombs http://www.theguardian.com/world/2003/jun/24/usa.science