I bought some planks a few days ago to make a DIY stools. Yesterday me and my bro started to cut a few using a saw and one of the plank is damaged. The plank looks nice from the outside, but after I cut off the end, I noticed that there are two holes inside of it. I don't think it is caused by the factory machines, most likely it was made by an insect. Maybe a Beetle that loves to make a nest inside a tree.
