What made Hari Pulakkat focus on scientists' stories for Space. Life. Matter.?

He's been a science journalist for more than three decades. And yet, when Hari Pulakkat sat down to write his first book, he knew there were many stories still untold. India's countless milestones from Independence to the year 2000 needed to be presented. But how? Here's how he worked out a way to tell stories of ingenuity and adversity, led by eminent scientists themselves.