A Sir George Cayley moment on Mars | Brief letters

Shell sponsorship | Sir George Cayley | Old friends reunited | Retrieving the Guardian | Obtaining the Guardian

In Bob Ward's point-missing riposte to George Monbiot's criticism of the Science Museum's acceptance of sponsorship from Shell, the words Shell" and sponsor" are notable by their absence (Letters, 22 April). He doesn't say if, as an adviser to the carbon capture exhibition, he thought Shell's sponsorship was wrong, a disagreeable necessity, or just lovely. Could someone ask him?
Brian Smith
Berlin, Germany

A Nasa representative described Ingenuity's flight on Mars as a Wright brothers moment (Report, 19 April). More accurately, it was a Sir George Cayley moment, as he is the father of aeronautics. In 1909, Wilbur Wright said of him: About 100 years ago an Englishman, Sir George Cayley, carried the science of flying to a point which it had never reached before."
Tony Meacock
Norwich