The work was dangerous for the more than five thousand men who worked on the structure.

VOA: special.2009.08.12

Roderick MacKinnon, of the Rockefeller University, in New York, worked out the structure of the one that carries potassium.

ECONOMIST: The Nobel prizes

This study found that concrete which contained a high proportion of long steel fibres in its structure worked best.

ECONOMIST: Bunker-busting

Can you name any company where a dual-CEO structure has worked?

FORBES: Research In Motion's Co-CEOs are Brutal at Fortune Telling