Thursday assorted links

1. The Danish negative interest rate mortgages are not exactly that.  And yes, some Americans are trying to apply for them.

2. What is the best current knowledge on how the pyramids were built?

3. Rob Wiblin interviews Vitalik Buterin.  Self-recommending!  And some reporting on selected remarks.

4. “…we find that question askers significantly overestimate the interpersonal costs of asking sensitive questions.”

5. Paul Romer visits Burning Man (NYT feature article).