We have two eyes, two ears, two hands, two legs, two lungs & two kidneys: Why did nature give us two of everything?

Why nature gave us a 'backup': Two eyes, two ears, two hands, two legs, this isn’t a coincidence but one of evolution’s smartest designs. From survival advantages to brain efficiency, your body’s symmetry hides a fascinating biological strategy millions of years in the making.  

from Zee News :Zee News - Health https://ift.tt/ATpXCka
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