Humans cannot walk in a straight line without visual help -When blindfolded, they will gradually walk in a circle and no one has any idea why. if they don’t have absolute references or visual points, such as a tree or a mountain in the distance or the sun or moon.
Humans simply can’t walk, swim, or even drive without visual help.
By conducting a numbers of experiments with blindfolded test , a group of researchers at the Max Planck Institute for Biological Cyber-genetics in Germany have found out some explanations for walking in circle.
In a test, six students were taken to a large flat forest in Bienwald, southern Germany, and told to walk in a straight line without visual help. Four of them ended up walking in circles, despite thinking they were going straight. Two others were able to see the sun , and so kept going in a straight line.
the Max Planck team found out some mysterious reasons behind loopy walking , they thinks the brain’s body awareness and balance maintaining systems combine to enable regular spatial updating and it may be the vestibular system in the inner ear that inactive in the absence of visual clues. and another reason is humans have a tendency to lean to one side more than the other, this is because one side of the brain is the dominating other.