Great Computerphile on tail recursion today... they don't mention it, but not all languages automatically optimize the call stack for you. (Looks like they might discuss this in the Extra Bits once ...

"I want to give you a new superpower yah" love this channel. keep it up guys. #recursion #computerphile ...

- [What on Earth is Recursion? - Computerphile](https://www.youtube.com/watch?v=Mv9NEXX1VHc) - [Recursion 'Super Power' (in Python) - Computerphile](https://www ...