When do science begin?
Perhaps when early humans, more than a million years ago, picked up rocks and chipped them to form stone tools. Someone tried several different kinds of rocks.
She or he noticed that a particular type of rock produced a cleaner, sharper edge than the other types. This was one of the first trial-and-error series of experiments. Gradually other kinds of rocks were tested and found to be even better. Materials scientists do the same today, formalulating the latest metal alloys and tailor-made composites for special purposes.
Anushka
Prakash
IV- B
Bal Bharati Public School,
Brij Vihar, Ghaziabad
