Watching so much recorded history die every day, it's no wonder our ideas of near antiquity are contradictory at best...
Conversation
I got access to an unreasonable amount of unusual education through blogs that have since been deleted.
I'm sure most of them are still stored on a database, but it's doubtful if much of that information will ever be recovered.
1
3
All of which, obviously, is a drop in the ocean. But more knowledge than you could fit into a human lifetime dies every day.