What I like about slime is that it's about nothing. Instagram is filled with videos of the shapeless substance. They often begin with a glob of vibrant, wobbling slime on a white surface. Manicured ...

Once you’ve seen a slime mold—its gooey, delicately branching structure oozing in a vaguely unsettling way along a log or leaf—you’re unlikely to forget it. They’re unmistakable because there’s ...