Wood arrived, it was whole, alive, wood with a lot of invisible "cell", arranged in a layer. Good drying, it is impossible to completely dry all moisture in the cell, so when the temperatures and climate change, no drying "cell" is like the skin's pores breathe, it is often said that the "expand". Is why solid wood furniture will have the expansion joints and, of course, of the extent of the cracking is about, if cracking too seriously, which is made of dried is not in place.
Solid wood crack is not inevitable, as long as at the time of purchase to pay attention, choose the high integrity of brand furniture, attention to the quality and texture of wood. Buy back, everyday use and maintenance, minimizing the chances of cracking can be solid wood.