Editorial section — ∫ ∇ · dF
Physical modelling, fundamental mathematics, fluid dynamics and formal methods.
Two advances published almost simultaneously show brain-computer interfaces capable of restoring speech, gestures, and even imagined speech. Their next problem may no longer be decoding more, but knowing when not to listen.
We knew about the immense hexagon at Saturn's north pole. Its south pole has now revealed a ten-sided structure that appears to have emerged before our eyes. This is not a geometric curiosity: it is a rare natural experiment in how a chaotic atmosphere can spontaneously organize itself.
Did another version of you make the opposite choice, live a different life, or follow another future? Between many worlds, the multiverse, extra dimensions, and spacetime, physics allows dizzying ideas — but not exactly the ones science fiction has taught us.
Looking at the sky is like receiving images from the past, delayed by time. Eight minutes for the Sun, 2.5 million years for Andromeda, and almost the entire history of the universe for the cosmic background: how far back can we actually see?