What could you do with a third thumb?
A New Zealander at Cambridge University, Dani Clode has built a prosthetic you can wear on your hand - strapping in opposite your other thumb.
It connects with controls at your feet. Recent research has found her third thumb was incredibly useable - 98 percent of nearly 600 people who trialed the 'Third Thumb' successfully operated it and performed a task.
She developed the third thumb to increase the wearer's range of movement and improve grasping capability - extending the carrying capacity of the hand.
Dani is head designer and senior technical specialist at Cambridge University's Plasticity Lab.
