It is important to understand that wood expands and contracts with changes in the environment, especially changes in humidity.  When the relative humidity decreases, the water content of the wood decreases resulting in shrinkage of the wood fibers.  This shrinkage can reach a point where wood can warp, twist, or crack.
 
Minimize these problems by placing wood art where –sunlight won’t shine on it, –heating or air conditioning ducts won’t blow on it,  –other sources of heat won’t be directed at it.