It is not uncommon when I am breaking the scrap of wood from ripping so they will fit into the trash can for it to break in two places simultaneously, launching the middle piece across the room.

How does it manage to break at two points at exactly the same time. It just seems so much more likely that there would be one weakest spot, and that would relieve the stress on the other.

I have pondered this phenomenon for years, but have never run across an explanation. Do any of you know, or think you know?

While I would like to hear your theory. I would rather be led to a scientific study.

Thanks for any help. Keith