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12 stories from Planck Standard. Latest: September 17, 2026.
The Károlyházy model held that tiny ripples in spacetime erode quantum superpositions and explain why big objects behave classically. The VIP collaboration at Gran Sasso says the predicted signal isn't there, and the null result narrows where quantum gravity can hide.
The equivalence principle has only ever been tested on ordinary matter. Muons live 2.2 microseconds, so the ETH Zurich team turned helium's chemical potential into an 'atomic cannon.' If muonium falls differently, it could point to a fifth force.
Penn researchers used the Atacama Cosmology Telescope to watch galaxy clusters pull on each other at the largest scale ever measured — and squeezed the room left for modified-gravity alternatives to dark matter.
NIST physicist Stephan Schlamminger spent a decade measuring the universal gravitational constant while keeping his own results hidden from himself.
NIST physicist Stephan Schlamminger spent a decade measuring the universal gravitational constant while keeping his results hidden from himself to avoid bias.
NIST scientist kept results hidden from himself for a decade, but opening the envelope confirmed gravity constant remains frustratingly elusive.
New research suggests that spontaneous quantum collapse processes could introduce tiny uncertainties into time's fabric, setting fundamental limits on clock precision.
New research reveals that quantum collapse processes linked to gravity may create fundamental limits on time's precision, opening new paths to unify physics.
New research suggests gravity-linked quantum processes could blur time at the most fundamental level, revealing hidden limits to precision.
New research suggests spontaneous quantum collapse processes linked to gravity could create tiny limits on how precisely time can ever be measured.
New research reveals spontaneous collapse processes linked to gravity could subtly blur time, setting fundamental limits on precision.
New research reveals that a cosmic tug-of-war between gravity and plasma creates interference patterns that form the striking radio wave stripes.