Context

• Scientists in the United States have created the world’s first “living machines” — tiny robots built from the cells of the African clawed frog, that can move around on their own.
• The species of aquatic frog was found across sub-Saharan Africa from Nigeria and Sudan to South Africa, Xenopus laevis.
• The living machines are less than a millimetre (0.04 inches) wide-small enough to travel inside human bodies.
• They can walk and swim, survive for weeks without food, and work together in groups.