The atoms are going through decomposition.They are breaking apart into the elements they are made of. 
 
        
             
        
        
        
Arthritis is a joint disorder involving joint inflammation.Pain is often localized to only the affected joint. Osteoarthritis is a wear and tear type of arthritis often affects aging population affecting joints in hands,knees and lower back. Heberden's node is an example and develops around middle age thus Wendell might have this.
        
             
        
        
        
D oxygen there was no free oxygen on the earth