Throughout, the media took dead aim at our strategic zig-zags and revolving-door CEOs.

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Officers gave out dozens of warnings to parents who pulled up on the zig-zags painted on the road outside the school.

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But the zig-zags of life were already taking their course.

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Dr Bodenschatz and his team are now scrutinising video footage of the lava lake in the Kilauea crater in Hawaii, to see if its zig-zags are produced by the same pattern of cooling and plate-spreading that is observed in the wax.

ECONOMIST: Geophysics