Since his daughter's behaviour became the focus of media attention, Mr Winehouse, 57, has increasingly been on hand to explain her actions.

BBC: Mitch Winehouse

By using two air muscles to pull a joint in different directions, the robot hand is capable of strong and precise actions.

ECONOMIST: Mechanical hand seeks dangerous, dirty and dull jobs

Politics, like the free markets of Adam Smith, tends to be guided by an "invisible hand": Countless individual decisions and actions together express a collective logic and even wisdom.

NPR: Let's Talk About The Risks of Undivided Government