“Double, double, toil and trouble; Fire burn, and cauldron bubble,” the agency said. “No, this isn’t a witches’ brew! These swirls are blue-green algae, or cyanobacteria.” The photo ...

the witches use a sink instead of a cauldron to mix a life-saving potion. But as they toss the ingredients of their witches’ brew into the sink, Jennifer Kale (Sasheer Zamata) realizes this ...