##உமிழ்நீர் ​ #மனிதஆற்றல் ​#அறிவியல்உண்மை ​#SalivaScience ​#BioSignals ​#HumanNature

நிழல் to நிஜம்

**மனிதனின் பயமும் இயற்கையின் உண்மையும்:

What did primitive man fear? Why does a snake dance and take pictures? Why does a dog bark? Why does a man carry a stick in his hand? Why does he build a house? Why does he save m…