Category: Mining - Approximately how deep are the deepest mines (in km)?

Questions

Which WW2 fighter-bomber did de Havilland's make out of wood?

Which sweet-sounding fungus kills trees?

Which jazz pianist composed the jungle music "Black and Tan Fantasy" with Bubber Miley, and recorded it with his band in 1927?

What did Brahms compose for the University of Breslau after they gave him an honorary PhD?

Who formulated the laws which first explained the movements of the planets properly?