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What is space-time? A mystery at the heart of reality

A mystery at the heart of reality - Date: - June 8, 2026 - Source: - The Conversation - Summary: - What if our biggest idea about reality is built on a hidden misunderstanding? A new philosophical look at space-time challenges the popular view that the past, present, and future all exist together in a timeless "block universe."

Science Daily 2d ago

Entanglement Builds Space-Time. Now "Magic" Gives It Gravity

Entanglement Builds Space-Time. Now “Magic” Gives It Gravity. In 1973, John Archibald Wheeler described the relationship between space and matter in two sentences: “Space acts on matter, telling it how to move.

Hacker News 5d ago

'Crystals' of space-time could be the origins of certain rare black holes, theoretical study hints

'Crystals' of space-time could be the origins of certain rare black holes, theoretical study hints By taking general relativity into higher dimensions, a trio of physicists has proven that a mathematical pattern of ripples in space-time geometry could give rise to naked singularities and microscopic black holes. A new theoretical study adds fresh support to the idea that a mathematical pattern of ripples in space-time geometry could give rise to naked singularities and microscopic black...

Live Science 3d ago

How To Track Qubits Through Space and Time (Or: Sailing in a Quantum Boat)

Announce Type: cross Abstract: While quantum position verification aims to certify a prover's location using quantum information, existing security definitions only guarantee that part of the successful adversarial party is in the claimed location. This leaves open the possibility that a distributed team of adversaries can jointly simulate a prover in a way that defeats the intended meaning of ``being at a location'' in position-based cryptography. We introduce stronger notions of position...

arXiv CS 10d ago

Approximation Properties of Evolutionary Dynamics in Continuous-Time Finite State Space Games

arXiv:2606.11193v1 Announce Type: new Abstract: This thesis studies the convergence of finite-population stochastic evolutionary dynamics to their deterministic mean-field limit in continuous-time finite state space games. We first develop refined ergodic theorems for Markov chains with a single positive-recurrent class, guaranteeing the existence of a unique invariant distribution and almost-sure convergence of time averages. Next, we prove that the mean-field model, described by a system...

arXiv CS 3h ago

Limitations of Taylor hypothesis in a forest clearcut flow

arXiv:2507.12069v3 Announce Type: replace Abstract: Taylor's hypothesis (TH) converts temporal observations to spatial information of the flow while carrying out measurements on a micrometeorological tower. Other than TH, there exists a more general elliptic model, which converts time to space by focusing on the geometry of the space-time correlation function. In elliptic model, TH is recovered when the space-time correlation functions are straight lines and when TH is invalid, they are...

arXiv Physics 2d ago

The 9 best one-season space and sci-fi shows of all time

The 9 best one-season space and sci-fi shows of all time One-and-done still hits the sweet spot with these (inter)stellar space shows. Not every space show is here for a long time. Some of them are just here for a good time – or in this case, only a single season.

Space.com 7d ago

Learning Long Range Spatio-Temporal Representations over Continuous Time Dynamic Graphs with State Space Models

arXiv:2606.04672v2 Announce Type: replace Abstract: Continuous-time dynamic graphs (CTDGs) provide a richer framework to capture fine-grained temporal patterns in evolving relational data. Long-range information propagation is a key challenge while learning representations, wherein it is important to retain and update information over long temporal horizons. Existing approaches restrict models to capture one-hop or local temporal neighborhoods and fail to capture multi-hop or global...

arXiv CS 6d ago

Learning Long Range Spatio-Temporal Representations over Continuous Time Dynamic Graphs with State Space Models

arXiv:2606.04672v1 Announce Type: new Abstract: Continuous-time dynamic graphs (CTDGs) provide a richer framework to capture fine-grained temporal patterns in evolving relational data. Long-range information propagation is a key challenge while learning representations, wherein it is important to retain and update information over long temporal horizons. Existing approaches restrict models to capture one-hop or local temporal neighborhoods and fail to capture multi-hop or global structural...

arXiv CS 7d ago

Folding Beijing

At ten of five in the morning, Lao Dao crossed the busy pedestrian lane on his way to find Peng Li. After the end of his shift at the waste processing station, Lao Dao had gone home, first to shower and then to change. He was wearing a white shirt and a pair of brown pants—the only decent clothes he owned.

Hacker News 10d ago