It is at once a wordless time-travel adventure and a meditation on the scientific theory that dinosaurs were the evolutionary ancestors of birds.

Time Flies, a wordless picture book, is inspired by the theory that birds are the modern relatives of dinosaurs.  This story conveys the tale of a bird trapped in a dinosaur exhibit at a natural history museum.  Through Eric's use of color, readers can actually see the bird enter into a mouth of a dinosaur, and then escape unscathed.