careerbydoing

Explore a field by solving real problems in it.

• High-energy theory12 problemsMost of these problems take Fermi's theory of beta decay apart. It stops working at an energy you can calculate, and that is how the W boson was anticipated decades before anyone saw one. The rest ask what a theory is allowed to contain.
• Web development9 problemsLearning to read and change this codebase, starting from Python. JavaScript semantics, HTTP, and where each line of code actually runs.