Scientists have built a tin-foil robot baby that is capable of crawling just like a real-life child.
Professors from Purdue University in Indiana designed the creepy tot to study how children pick up different bacteria as they traverse the ground.
Researchers from the West Lafayette university’s Lyles School of Civil Engineering found infants are exposed to harmful particles in the air as they are close to the ground.
This is because the child’s movements create a cloud of filth, which can then coat babies’ lungs.
The higher concentrations of the dangerous particles are around 20 times closer to the floor, the study found.
Lead researcher Brandon Boor said: “For an adult, a significant portion of the biological particles are removed in the upper respiratory system, in the nostrils and throat.
“But for very young children, they more often breathe through their mouths, and a significant fraction is deposited in the lower airways – the tracheobronchial and pulmonary regions.
“The particles make it to the deepest regions of their lungs.”