Physicists have measured the smallest gravitational field ever recorded, in an experiment that could help in the search for a unified theory of physics. Of the four fundamental forces known to physics ...
If the recent discovery of gravitational waves emanating from the early universe holds up under scrutiny, it will illuminate a connection between gravity and quantum mechanics and perhaps, in the ...
Gravity is a ubiquitous part of our daily lives — whether we’re being tragically brought to our knees after tripping on the rug or gleefully jumping from a swing’s apex. But despite how common the ...
Pulsars suggest that ultra–low-frequency gravitational waves are rippling through the cosmos. The signal seen by ...
Scientists really don't understand time... but they do have some theories about what it might (and might not) be.
If you’re superstitious, a black cat in your path is bad luck, even if you keep your distance. Likewise, in quantum physics, particles can feel the influence of magnetic fields that they never come ...
For example, photons are the carrier particles for the electromagnetic force. As such, scientists have tinkered with theories for "quantum gravity" and searched for its hypothetical carrier particle, ...
Experiments that search for gravitational waves tend to be very large. The LIGO detectors in the US, for example, have arms that are 4 km long. This is because the gravitational interaction is much ...
There are quite a few fundamental constants. These are things like the speed of light (c) the charge on an electron (e), and the Planck constant (h). These constants are determined with some type of ...
In the last episode of Cosmos: A Spacetime Odyssey (which you can watch online), the show was trying to make a case for dark matter. Here is what Neil DeGrasse Tyson said about orbiting objects. "In ...