While the finish given to our picture of the world by the theory of relativity has already been absorbed into the general scientific consciousness, this has scarcely occurred to the same extent with those aspects of the general problem of knowledge which have been elucidated by the quantum theory.

Observations indicate that the universe is expanding at an ever-increasing rate. It will expand forever, getting emptier and darker. Although the universe doesn’t have an end, it had a beginning in the Big Bang. One might ask what is before that but the answer is that there is nowhere before the Big Bang just as there is nowhere south of the South Pole.

Almost everywhere, climate change denial now looks as stupid and as unacceptable as Holocaust denial.

When it comes down to it, the reason that science fiction endures is that it is, at its core, an optimistic genre. What it says at the end of the day is that there is a tomorrow, we do go on, we don't extinguish ourselves and leave the planet to the cockroaches.

Neither had Watt of the Steam engine a heroic origin, any kindred with the princes of this world. The princes of this world were shooting their partridges... While this man with blackened fingers, with grim brow, was searching out, in his workshop, the Fire-secret.

It seemed, indeed, that the study of light-scattering might carry one into the deepest problems of physics and chemistry, and it was this belief which led to the subject becoming the main theme of our activities at Calcutta from that time onwards.