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The first good snow on Mount Canigó in France seen from Girona. View in LinkedIn

THE HIDDEN LANDSCAPE. “I travelled to Haverfordwest to get to the past. From Paddington Station a Great Western locomotive took me on a journey westwards from London further and further back into geological time, from the age of mammals to the age of trilobites...Under the River Severn and into Wales, I was back before the time of the dinosaurs, to a time when Wales steamed and sweated with the humid heat of moss-laden and boggy forests in coal-swamps, where dragonflies the size of hawks flitted in the mist; and then on back still further in time, so far back that life had not yet slithered or crawled upon the land from its aqueous nursery.” (Richard A. Fortey, 1993). https://lnkd.in/gmRTQ2gq View in LinkedIn

ANTIPARTICLE REALITY. “Causality proceeds forward in time as far as the observer can see. If we can believe that each collapse of the wave function eliminates or drastically reduces the future contribution of superpositions of states of the particle which are inconsistent with the events at, say, T2 having occurred, how is this different for the antiparticle?” https://lnkd.in/gDaxUYAS View in LinkedIn

DETAILS OF CONJECTURE. “Consider the direction of causality in this example. At T2 when the physicist measures the particles they exist in one state of position and momentum each. Via the U-process they arrive at T3 in positions and momenta consistent with physical law and their states at T2 and so on with each measurement until Tn after which they can no longer be detected.” https://lnkd.in/gDaxUYAS View in LinkedIn

PARITY. “Note that the Feynman diagram for the above process is the same as for the scattering of an incident electron by a photon which has previously produced a positron and electron pair, the positron going on to annihilate the incident electron, the remaining electron from the pair proceeding onward in time.” https://lnkd.in/gDaxUYAS View in LinkedIn

LOOSE ENDS. “If the Schrodinger equation doesn't care about time direction between measurements why should we?” https://lnkd.in/gDaxUYAS View in LinkedIn

THE EXERCISE. “ For the electron, superpositions of states must be available in the observer's future at least until Tn when it disappears, in order for it to move forward in time to be measured at T2, T3..... What is the difference between these two situations?” https://lnkd.in/gDaxUYAS View in LinkedIn

THE EXERCISE. “At some times T2, T3..... the physicist makes measurements and finds the two particles. For the antiparticle, moving backwards in time, superpositions of states must be available in the observer's future where it will exist at least until Tn when it appears, in order for it to move backward in time to be measured at ......T3, T2.” https://lnkd.in/gDaxUYAS View in LinkedIn

A veritable blaze of Montpellier maples planted along the upper path leading to Girona’s Sant Daniel valley. View in LinkedIn

THE CAMBRIDGE PHILOSOPHICAL SOCIETY. “Adam Sedgwick (1785–1873) and John Stevens Henslow (1796–1861). Both men were aware that the study of the sciences in their University was largely moribund. Although there were professors of both botany and geology at Cambridge, and post-Newtonian mathematics was flourishing, the sciences...were a “peripheral activity”. The purpose of the University was primarily as a training ground for clerics.” https://lnkd.in/gkn3BKFd View in LinkedIn