Knowing where you are
You can get turn-by-turn directions. What more do you need?
explanation
The best learning
Proof and re-proof
Testing the theory again
General Relativity passes another test of its predictions. Why bother?
Making mistakes
Libraries and long walks
Alternate methods
The answer or the process?
When there’s more than one way to get there, you have to choose. This can be confusing or useful.
A village in space
How big is your village?
Thermodynamics is unfair
Photography: the hard part
Keeping track
It’s still the same task, digital or film. And it is still not done well, sometimes at all, by most photographers.