Why are scientists so determined to prove things? Because assuming can lead to all sorts of problems, as we learn in No One Could See the Flea. Jack is convinced his dog, Shank, has a flea. He doesn't see a flea, but Shank did scratch, so Jack begins searching for a remedy. Before long, things spiral out of control as Jack's friends offer their solutions, pushing Shank to his limit. It's a good thing Jack takes...