[rcollyer]

My eldest in some ways skipped the "why" stage. "How" was a much more important question to him. Although, he did ask his mother once why the sun was on fire, but she passed him off to me on. Because his questions were often complex, and outside of my expertise, I would often say, "I don't know", usually followed by, "we can look it up, though".

[sukilot]

One of the key lessons of physical science is that "why" is the same as "how". "Why" is a psychological layer, how we thinking about "how". There is no "why" in physics.

[tobrien6]

That's quite true in physical science. However, physical science is a fairly new endeavor. The "why" may not be entirely psychological, but mathematical, at the end of the day.