Oh leave the Wise our measures to collate. One thing at least is certain, light has weight. One thing is certain and the rest debate. Light rays, when near the Sun, do not go straight.

The electron, as it leaves the atom, crystallises out of Schrodinger's mist like a genie emerging from his bottle.

Who will observe the observers?

Probably the simplest hypothesis... is that there may be a slow process of annihilation of matter.

So far as physics is concerned, time's arrow is a property of entropy alone.

There was a time when we wanted to be told what an electron is. The question was never answered. No familiar conceptions can be woven around the electron; it belongs to the waiting list.

But it is necessary to insist more strongly than usual that what I am putting before you is a model-the Bohr model atom-because later I shall take you to a profounder level of representation in which the electron instead of being confined to a particular locality is distributed in a sort of probability haze all over the atom.