Surely mass is a red herring in all this. The masses involved must be waaaaaay too small to detect, especially in the presence of earth's gravity. Why would a

Surely mass is a red herring in all this. The masses involved must be waaaaaay too small to detect, especially in the presence of earth's gravity. Why would a slime mold even evolve this capability of detecting tiny mass differences? None of it makes sense. It's much more likely there's an ultra-thin tendril they haven't noticed.