While standing inside the water up to the waist height, it is very difficult to keep our feet under control. Why?
Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
It is very interesting to know that our body is made up of various acids. Each cell in our body contains acids. Can you think of an acid which is present in every cell and controls our looks, the colour of our eyes, our height and so on?