A proposed experiment could bring scientists closer to answering the long-standing question of whether gravity is a classical or a quantum phenomenon. (physics.aps.org)
Cold Chemistry is Different (physics.aps.org)
Feynman’s Reversed Sprinkler Puzzle Solved (physics.aps.org)
Physicist Richard Feynman wondered what would happen if an S-shaped lawn sprinkler, which rotates as water squirts out, were placed underwater and had its flow direction reversed, so that it sucked water in. Which direction would it rotate? Experiments have given conflicting answers, but now researchers have provided what...
Might There Be No Quantum Gravity After All? (physics.aps.org)
A proposed model unites quantum theory with classical gravity by assuming that states evolve in a probabilistic way, like a game of chance.
Why It’s Hard to Break Plastics (physics.aps.org)
De la lévitation magnétique sans supra-conducteur (physics.aps.org) French
Ça a l’air d’être une découverte récente (deux ans!) et même si je suis pas sur que ça ait d’immenses applications, je trouve ça sympa de savoir qu’on peut encore découvrir des choses surprenantes en bricolant dans son garage!
Researchers Capture Gravitational-Wave Background with Pulsar “Antennae” (physics.aps.org)
Four independent collaborations have spotted a background of gravitational waves that passes through our Galaxy, opening a new window on the astrophysical and cosmological processes that could produce such waves.
Dark Energy Spectroscopy Instrument Releases First Data (physics.aps.org)
The first data collected by the Dark Energy Spectroscopy Instrument contain close to 2 million objects, including a roughly 12-billion-year-old quasar. The collaboration expects to report their first cosmology-related results within a year.
Space Dirt Reveals Age of Saturn’s Rings (physics.aps.org)
Micrometeoroids in Saturn’s rings reveal that these dusty bands are no more than 400 million years old, making them significantly younger than the 4.5-billion-year-old gas giant.
