User blog comment:Zathronas/Speculative Author - RWBY Relativity/@comment-7622429-20160225135902/@comment-13499046-20160225211956

I always thought Salem saying that humans came from dust was dust with a little d, likely a legend, and when Dust was discovered they named it for what they believed was their origin "Dust" hence the "this power was appropriately named..." line.