A free body diagram models the forces acting on an object. The object or 'body' is usually shown as a box or a dot. The forces are shown as thin arrows pointing away from the centre of the box or dot.

It creates all kinds of problems, including hernias. If you imagine the human body as a wiring diagram, that's where you'd say, "No way does that work." The most remarkable is the hand.

Suhair Khan, founder of open-ended design, an incubator and research lab for AI, is struck by humanity’s intimate relationship with AI, which is increasing as the technology gains influence on how we ...