Might be a victim of A/B testing. The accurate headline would be "three black beekeepers are transforming Detroit's empty lots" but "black beekeepers are transforming Detroits empty lots" implies the existence of a new social movement with many members, which of course is more interesting and drives clickthroughs and hence ad revenue.

That said, Detroit Hives is a really cool team who deserve exactly none of the blame for Huffpost's bad journalism.