Unlike human eyes, fish and birds have eyes facing opposite sides. Do they see a single image or two images?”
C. Raahul, Chennai
Why do we clench our teeth while lifting heavy things or when under physical stress?
S. Krishna Sarath, Visakhapatnam, Andhra Pradesh
On a mountain, above 10,000 feet, oxygen would be less. Why?
K. Sankaranarayanan, Madurai, Tamil Nadu