Happy Monday! Sorry for the lack of links last week, but you are rewarded for your patience today with a plethora of great stuff, courtesy of readers Cassandra and Julie.

From Cassandra:

• The math question that went viral. (I got it wrong. Also, I have pragmatic questions about this social circle.) 
• Anthropologists are unsure whether Neanderthals engaged in cannibalism or elaborate rituals. 
•  Extremophiles in the plant and animal kingdoms! 
• The podcast All in the Mind sounds really interesting. 

From Julie:

• Alan Turing’s notebook has sold for $1 million. 
• Last week was National Library Week, and here are some of the world’s oddest libraries! 
• Liberland is a brand new state between Serbia and Croatia. Current population is seven. They’re inviting immigrants. What could go wrong?