THEY MIGHT BE GIANTS Nanobots [Idlewild] On Nanobots—their 12th studio album, not counting the four they’ve made for children—They Might Be Giants continue to be very serious about the business of being silly. This time out, the indie mainstays rhyme about combustible heads, the misguided commitments of karate, and occasionally even educational topics, as on their homage to Nikola Tesla and his works. With 25 tracks clocking in at just over...