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Why paint a ship so that it stands out?

Some camouflage tries to blend into a background. The bold geometric patterns painted on First World War ships pursued a different aim: making a visible vessel harder to interpret. Dazzle invites a useful distinction between noticing an object and correctly judging its shape or direction.

3–7 min

Questions you could explore

  • What can a painted silhouette suggest about direction even when the ship itself remains visible?
  • What evidence would distinguish an ingenious idea from an effective wartime measure?

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Why does a radiocarbon date need a second kind of clock?

History4–5 minA radiocarbon measurement does not translate directly into one calendar year. The amount of radiocarbon in the atmosphere has varied, so dating relies on comparison with material whose age is already known.

History

Reading a buried timeline

A deep object is not necessarily the oldest thing at an archaeological site. A later pit can cut through earlier ground, leaving a sequence that has to be reconstructed from relationships between layers.

12–15 min

Reading a buried timeline

History12–15 minA deep object is not necessarily the oldest thing at an archaeological site. A later pit can cut through earlier ground, leaving a sequence that has to be reconstructed from relationships between layers.

History

When Britain’s railways needed a shared clock

A timetable becomes awkward when the clocks at its two ends disagree. In nineteenth-century Britain, railway journeys helped turn local time into a shared coordination problem, while the telegraph helped distribute an answer.

8–10 min

When Britain’s railways needed a shared clock

History8–10 minA timetable becomes awkward when the clocks at its two ends disagree. In nineteenth-century Britain, railway journeys helped turn local time into a shared coordination problem, while the telegraph helped distribute an answer.

Why paint a ship so that it stands out? | Speech Topic | speaking.app