The Case of the Talking Monument Jagger and Muddy take a trip to Washington, D.C. At the Washington Monument, Jagger barks and hears an echo, insisting that 'the monument is talking back!' He believes it's Abraham Lincoln's ghost. Muddy shows him how echoes work by clapping, explaining sound bouncing from tall, hard walls. Later at the Lincoln Memorial, Muddy explains who Lincoln was and why he's honored-a leader who made the country fairer. Theme: Curiosity & history. Takeaway: Science explains echoes, and monuments honor important values.
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