So many times I have been reading a wikipedia page about.....lets say...history and end up with about 10 tabs waiting to be looked at which all link to subjects I know I'll find interesting which leads to another 3-4 tabs.
I could spend hours just reading.
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See, it either ends up just reading endless interesting articles, or doing wikipedia races with friends. Ex: start on ebola and make your way to Kanye West or something, and see who can do it first