Tired of winter? It's nearly over, and the signs are clear — if you're willing to look and listen, the author writes.

Experiments I’ve conducted suggest Americans regularly comply with advice — even when we know it is bad. We often surrender our liberty in surprising ways.

The narrowing can be central stenosis (referring to the main channel) or it can be foraminal stenosis (referring to the “exit ramp” for each individual nerve root). The condition can occur in the ...