Some fun math videos:

• How To Count Past Infinity
• The Banach–Tarski Paradox
• Numberphile v. Math: the truth about 1+2+3+…=-1/12

And some fun math articles:

• Ordinal number
• Infinitesimal
• Surreal number
• Ludwig Boltzmann
• Arithmetical hierarchy
• Turing jump
• Computably enumerable set
• Recursively enumerable language
• Creative and productive sets
• Post’s theorem
• Transfinite number
• Barber paradox
• Aleph number