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Category: Physics

Taming the multiverse: Stephen Hawking’s final theory about the big bang

Taming the multiverse: Stephen Hawking’s final theory about the big bang

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University of Cambridge, April 27, 2018 Professor Stephen Hawking’s final theory on the origin of the universe, which he worked on in collaboration with Professor Thomas Hertog from KU Leuven, has been published today in the Journal of High Energy Physics. The theory, which was submitted for publication before Hawking’s death earlier this year, is based on string theory and predicts the universe is finite and far simpler than many current theories about the big bang say. Professor Hertog, whose…

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Carlo Rovelli on changing how we think about time

Carlo Rovelli on changing how we think about time

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Charlotte Higgins writes: What do we know about time? Language tells us that it “passes”, it moves like a great river, inexorably dragging us with it, and, in the end, washes us up on its shore while it continues, unstoppable. Time flows. It moves ever forwards. Or does it? Poets also tell us that time stumbles or creeps or slows or even, at times, seems to stop. They tell us that the past might be inescapable, immanent in objects or…

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Pistachio trees ‘talk’ to their neighbours, reveals statistical physics

Pistachio trees ‘talk’ to their neighbours, reveals statistical physics

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Philip Ball writes: The number of nuts on pistachio trees in any given year could be explained with a model from statistical physics that is normally used to study magnetic materials. That is according to researchers led by Alan Hastings, a mathematical ecologist from the University of California, Davis, who have used the “Ising model” to analyse the yields of pistachio trees in one particular orchard in California. Their work explains why the orchard does not always have a uniformly…

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Cosmopsychism explains how the Universe became fine-tuned for life

Cosmopsychism explains how the Universe became fine-tuned for life

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Philip Goff writes: In the past 40 or so years, a strange fact about our Universe gradually made itself known to scientists: the laws of physics, and the initial conditions of our Universe, are fine-tuned for the possibility of life. It turns out that, for life to be possible, the numbers in basic physics – for example, the strength of gravity, or the mass of the electron – must have values falling in a certain range. And that range is…

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