Captain CP Krishnan Nair will turn 90 in February, but there isn't a wrinkle on his face.
He was up till midnight at an awards function, yet there is no sign of fatigue.
He sits at a corner table in the coffee shop of his hotel in New Delhi, the Leela Kempinski Palace.
He is dressed in a brown suit and a white shirt with its collar open.
There's a small gold medal on the lapel - the Global 500 Laureate Roll of Honour from the United Nations Environment Programme.
The wristwatch is cut from a single piece of lapis by a watchmaker called H Stern in Rio de Janeiro.
He sips intermittently from a tall glass of jeera pani.
"It cleanses the system," he says.
Text: Bhupesh Bhandari, Business Standard
Image: Wikimedia Commons