Physical Implications of a Fundamental Period of Time - A strong upper bound T_C < 10^− 33 s of the fundamental period of time, several orders of magnitude below any direct time measurement, is obtained from bounds on dynamical variations of the period of a system evolving in time.

A proposed interaction between neutrinos might explain a discrepancy in measurements of the Universe’s expansion rate.

Current understanding of cosmology and nuclear physics suggests that dark matter could be made of axions, hypothetical particles with unusual symmetry properties

New test of the gravitational 1/r2 law at separations down to 52μm

Quantum entanglement offers unprecedented precision for GPS and more

High Altitude Water Cherenkov Observatory Tests Speed of Light

Physicists grab individual atoms in groundbreaking experiment

Scientists have split a single photon of light into three

Scientists predict state of matter that can conduct both electricity and energy perfectly

Satellite test shows objects of different mass dropped in space fall at a rate within two-trillionths of a percent of each other proving the equivalence principle of Einstein’s general theory of relativity & the theory that the absence of air resistance…