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BIG UNKNOWNS. “These theorems claim to assume nothing about the unknown behavior of quantum gravity in regions of very high curvature” inside a black hole. https://lnkd.in/dUKnus8 View in LinkedIn

THE INFORMATION PROBLEM. “BH to WH scenarios, provided they can be given a solid foundation in quantum gravity, give a simple resolution of the black hole information problem and are counter-examples to propositions that form the basis of much of the work on quantum properties of black holes, such as the generalized second law and theorems predicting singularities in the interior of quantum black holes.” BH = black hole; WH = white hole). View in LinkedIn

KEY ASSUMPTION. “In this paper I assume that almost all of the negative energy associated with Hawking "partners" remains inside the white hole until it interacts with the rebounding matter that formed the black hole.” https://lnkd.in/dUKnus8 View in LinkedIn

TRANSITION EXPLAINED. “I have demonstrated that a smooth quasi-classical transition from an evaporating black hole to a white hole is consistent with a spacetime with the global causal structure of Minkowski spacetime, and does not require any large quantum effects outside regions of Planckian spacetime curvature. Whether this is actually consistent with quantum gravity remains an open question.” https://lnkd.in/dUKnus8 View in LinkedIn

Ancient arches in limestone on small round church in Girona. View in LinkedIn

He’s at it again: he loves to be under blankets and pillows and gently thumped from above. View in LinkedIn

KARL R POPPER. “It is not my intention to raise any “what is” questions, such as “What is mind?” or “What is matter?”. (In fact the need to avoid “what is” questions will turn out to be one of my major points). It is still less of my intention to answer such questions. (That is, I am not offering what is sometimes called an “ontology”.) https://lnkd.in/dbkcDjD View in LinkedIn

THE BIG BANG AND MORE. “Theorists nonetheless ponder the possible existence of other kinds of atoms—not just additional elements yet undiscovered, but atoms built differently from the ones we know on Earth.” (Brilliant summary articles). https://lnkd.in/dqtx5yd View in LinkedIn

QUASARS. “Given the compact sizes of these inner regions (sub-parsec for a 108 M⊙ BH), variability induced by instabilities in the accretion flow, reprocessing of light, and dynamical evolution of the inner regions can be observed over a broad range of timescales from intra-hours to decades, providing observational constraints on these regions that are too small to be spatially resolved directly.” (M⊙ = unit of sun’s mass). https://lnkd.in/dEvc7DF View in LinkedIn

SO ENDS this article on the genetics of an extraordinary and hugely successful evolutionary strategy that hijacks the host reproductive system. Parasites are known to manipulate host behavior in equally extraordinary ways, causing them to suicide in order to perpetuate the parasite; there seem few limits to how deeply life forms can be hacked, a sobering thought. https://lnkd.in/dXjWp9f View in LinkedIn