Why can’t one walk in a straight line when blindfolded?

N. Saranya, Velayuthampalayam, Tamil Nadu

A force is required to move or spin an element/object. What is the force that causes the earth and other planets to rotate on their own axis?

Venkatesh D., Chennai

An owl can search for its prey in the darkness. How ?

A. Pichai, Thanjavur, Tamil Nadu

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