There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
Yeah, those glasses break time to time. Gorillas are 150-200 kg, so they have a lot of weight behind kick even when kick itself is quite normal looking. There is a video showing how small monkey break glass of its enclosure by small hit with stone in the hand. Sometimes hit on the right spot and that´s it. Those glasses can be shattered easily if there is some manufacturing defect and also with time they can be weakened to the point, that at one point there comes that final hit making it happen.
I don´t know how often they replace those glasses or do they wait, until broken before changing to new one.