Math and Multimedia is a great site for your mathematical curiosities and graphical pretties! You can easily lose yourself learning from post to post. I know I did.

For example, A Fascinating Introductory Video to Mathematical Proofs. It contains a short, entertaining TED video about math proofs and why we need them.

(Honestly, I was looking for a reason to share this video but still provide the reference).

Enjoy the Mathy Goodness!