London clay is cut away and the giant tube moves slowly forward.

BBC: London's underground boring renaissance

It is a small plastic tube with 20 holes cut into it in which are inserted cut-down cigarettes, some ringed with lipstick.

ECONOMIST: Damien Hirst

Until a few years ago, to treat aortic aneurysms surgeons cut a patient from breastbone to pubic bone and replaced the damaged section with a synthetic tube.

FORBES: By the Numbers