A new recipe of "quadratic gravity" could help to better define the picture of the Big Bang and the singularity that existed ...

Positronium shouldn't last long enough to be interesting. It's an "atom" assembled from an electron and its antimatter twin — ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. A visualization of how the ...

Add Yahoo as a preferred source to see more of our stories on Google. For close to a century, scientists have been trying to marry Albert Einstein’s General Theory of Relativity and quantum theory—our ...

In quantum physics, objects can exist in multiple states at the same time—a phenomenon known as quantum superposition, where a particle does not have a single definite value of position or momentum ...

In quantum mechanics, particles do not behave like everyday objects. Instead of existing in one clearly defined state, they ...

For the first time, scientists have observed quantum entanglement in the momentum of massive particles. The result, decades in the making, could help physicists probe the relationship between quantum ...

Only about 5% of the universe is composed of normal matter that we can directly observe, while the remaining 95% is widely ...

A new study suggests that certain 'quantum collapse models'—which posit that wavefunction collapse happens spontaneously—could be tied to gravity, introducing a tiny intrinsic uncertainty in time ...

Quantum mechanics has always carried a quiet tension. At its core, the theory allows particles to exist in many states at once, described by a mathematical object called a wavefunction. Yet daily life ...

Two recent studies explore whether time can exist in quantum superposition and how gravity might affect its measurement. One proposes using advanced ion clocks to detect quantum states of time, while ...