Dilly Barlow travels to the House of Commons to investigate its emblem, and also discovers why a yawn is infectious and why sunlight can bring on a sneeze.
Researcher SUZY DYSON Producer FIONA COUPER
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Dilly Barlow travels to the House of Commons to investigate its emblem, and also discovers why a yawn is infectious and why sunlight can bring on a sneeze.
Researcher SUZY DYSON Producer FIONA COUPER