Gravity is by far the weakest of nature’s four fundamental forces, and physicists have spent decades asking a deceptively ...

It’s been 120 years since Henry Cavendish measured the gravitational constant with a pair of lead balls suspended by a wire. The fundamental nature of gravity still eludes our best minds - but those ...

This also means that there could be hidden curvatures of space-time or gravitational fields, which could explain a ...

Dimensions beyond the four we’re familiar with could solve a host of problems in physics and cosmology. Columnist Leah Crane ...

Scientists have measured gravity at an extremely short distance, in what they hope will tell us more about extra dimensions. The rest of this article is behind a paywall. Please sign in or subscribe ...

In 1919, physicist Theodor Kaluza hypothesized that extra dimensions might solve some outstanding problems in physics. And while we haven't found any evidence yet for anything outside our normal ...

A recent study has made strides toward solving one of physics’ biggest puzzles: including all known particles and interactions into the theory of quantum gravity. The solution is to modify the quantum ...

When it comes to the dimensions of spacetime, what you see may be what you get. Using observations from the collision of two neutron stars that made headlines in 2017 (SN: 11/11/17, p. 6), scientists ...

Scientists have used a pulsed slow neutron beamline to probe the deviation of the inverse square law of gravity below the wavelength of 0.1 nm. The experiment achieved the highest sensitivity for a ...

PBS Space Time is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet, Roku, Samsung Smart TV, and ...

In our universe there is a big problem with gravity. It is far weaker than the other fundamental forces and scientists cannot explain why. One proposal is that its energy is leaking into other, ...