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13 stories from Planck Standard. Latest: September 12, 2026.
Using the Large Binocular Telescope to read helium lines in 48 metal-poor galaxies, the LBT Yp Project pinned the primordial helium fraction at 0.2458 ± 0.0013, cut the uncertainty from about 2% to nearly 0.5%, and found no room for a fourth neutrino in the universe's first seconds.
Physicists thought only heavy nuclei like lead could produce quark-gluon plasma. The ALICE collaboration just made it with nuclei a fraction of the size, which means the recipe is not what anyone assumed.
Physicists thought you needed lead — 200 times heavier than a proton — to melt matter into quark-gluon plasma. Oxygen and neon just did it, and ALICE, ATLAS, CMS and LHCb all saw it independently.
A University of Birmingham experiment shows the flow of time can arise from a quantum system's own behavior, no external clock required. The setup could let scientists test ideas about the Big Bang in the lab.
Physicists say a collision between two objects lighter than the Sun, detected last November, could point to black holes born in the first instant after the Big Bang — and to the identity of dark matter.
EGS-z11-R0 is large, regular and chemically enriched at a moment when galaxies are supposed to be small, blue and primordial — defying leading models of structure formation.
New research suggests ancient ripples in spacetime could have transformed into the invisible particles that shape galaxies today.
New research suggests ancient ripples in spacetime could have transformed into particles that became the invisible substance shaping galaxies today.
New research suggests ancient ripples in spacetime could have transformed into particles that became the invisible substance shaping galaxies today.
Researchers discover that spacetime ripples from the Big Bang may have transformed into particles that became the invisible substance shaping galaxies today.
A new paper in Physical Review Letters proposes that stochastic gravitational waves generated in the first moments after the Big Bang could have been converted into dark matter particles — a mechanism never before proposed that could solve one of physics' most fundamental mysteries.
University of Waterloo researchers propose that the Big Bang's explosive expansion emerges naturally from deeper quantum gravity framework, offering testable predictions.
University of Waterloo researchers propose that Big Bang inflation arises naturally from deeper quantum gravity framework, offering testable predictions for future experiments.