In this series we examine conclusively which blocks mobs do or do not spawn on. Although the minecraft wiki can supply answers to many of the questions this series will ask there are two issues with this: 1. The wiki can be edited by anyone and filled with speculation, and; 2. Many people will refuse to believe certain facts on the wiki unless they are presented with hard proof (which can be difficult to come by). That's where this series comes in - it provides irrefutable proof of what mobs can and can't spawn on.