The Missing Homework Mystery

Every Monday for three weeks, my homework vanished from my bag somewhere between home and school. I inspected my bag for holes — there were none. I questioned my little brother, who looked far too innocent, which almost certainly meant he was lying. Then the fourth week it happened again, and this time I spotted a crow behaving very suspiciously near my bag at the bus stop. Crows are remarkably intelligent birds — intelligent enough to recognise that paper has...