Among the things I learned this week:
* “Squirrels who bury their nuts in the ground lose more than half, because they cannot remember the place.” (Courtesy: Beatrix Potter)

* ISIS doesn’t claim responsibility for attacks when the perpetrators survive. Except for this most recent NYC attack. (Courtesy: Rukmini Callimachi/NYT)

* The highest note hit at the Met Opera is the A above high C, as sung by Audrey Luna. (Courtesy: Zachary Woolfe/NYT)