First Questions & Answers: Why is it dark at night?

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From sunset to sunrise, discover the secrets of night time - why it happens, where the Sun goes... and what the night sky can tell us about the universe. Playful flaps, delightful illustrations and friendly text explain the science behind the cycle of day and night, summer and winter. Find out why it's not always dark at bedtime, how night animals find their way and why the dark doesn't have to be scary.