When a lecture on the seashore gave Kalam his aim in life

Nuggets about the former President's life find mention in a new book co-authored by Kalam and his former scientific advisor Srijan Pal Singh

A brief class by his teacher on the Rameswaram seashore on how birds fly and the locomotive force behind their flight gave former President A P J Abdul Kalam his aim in life and helped him in understanding physics better.

This and several nuggets about Kalam's life besides advice for young people on careers in areas like robotics, aeronautics, neurosciences, pathology, paleontology and material sciences find mention in a new book "Reignited: Scientific Pathways to a Brighter Future," co-authored by Kalam and his former scientific advisor Srijan Pal Singh.

Kalam says as a young boy, he used to love the stories of the pilots and their planes and was curious about planes. Also he wanted to be a pilot himself.

"Back in my village there were few people who could discuss aircraft. I was a disadvantaged child from a non-educated family; yet I had the advantage of being in the company of great teachers. My curiosity was fulfilled by a very special teacher when I was a 10-year-old boy in class V. This was indeed a life-changing event," he writes.

He then goes on t describe one of the most important event of his life.

"My science teacher's name was Sivasubramania Iyer. One day, the topic of discussion in our class of 65 was 'how birds fly'. He went to the blackboard and drew a sketch of a bird with a tail, wings and head and explained how a bird flew.

"The same day he took us to the Rameswaram seashore where we saw dozens of seabirds flying. My teacher said, 'Look how the birds are flapping their wings, now see how they change direction using their wings and tail. What is the locomotive force behind this flight - it is the life energy of the bird'."

The teacher told the students that the same principles make an aircraft fly and within an hour of the lesson, Kalam learnt how birds fly.