2 -> Play -> Outer Wilds
Math is logical, functional and just ... awesome. Mathemagician Arthur Benjamin explores hidden properties of that weird and wonderful set of numbers, the Fibonacci series. (And reminds you that mathematics can be inspiring, too!)
Link
Black holes have a temperature, and hence entropy. ...But if a black hole are just an extreme scrunching of smooth space-time, it should have no substructure, and thus no entropy. This is probably the most obvious incompleteness of general relativity.
Black holes have entropy, but general relativity says they are unstructured, and lack entropy
New Scientist writers (New Scientist articles [2013], 2015.11.07)