"Despite the superfluous plotline, this wins high marks for its clear, specific introduction to one of modern astronomy's great puzzles. (Picture book/nonfiction. 7-9)"
In this very thinly disguised science lesson, a pair of freckle-faced, entirely wholesome-looking young detectives take on two cases at once: finding the Mayor's missing Pekingese, and joining the hunt for the elusive "dark matter" that scientists posit to explain the universe's large-scale gravitational behavior.
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