What Is Spacetime Really Made Of?
Spacetime may emerge from a more fundamental reality. Figuring out how could unlock the most urgent goal in physics—a quantum theory of gravity -- Read more on ScientificAmerican.com.....»»
The Big Bang should have made cracks in spacetime—why haven’t we found them?
Cosmic strings' greatest power? Their ability to confound physicists. Enlarge / A computer-generated simulation of cosmic strings. (credit: Chris Ringeval) Remember that time in the Lord of the Rings lore when the dwarves of M.....»»
How Physicists Cracked a Black Hole Paradox
Quantum entanglement and spacetime wormholes helped to solve a long-standing quandary.....»»
A step towards quantum gravity
In Einstein's theory of general relativity, gravity arises when a massive object distorts the fabric of spacetime the way a ball sinks into a piece of stretched cloth. Solving Einstein's equations by using quantities that apply across all space and t.....»»
Researcher documents what happened during the first attempt at a gravitational-wave observatory in Europe
First predicted in Einstein's theory of general relativity, gravitational waves are tiny ripples in spacetime generated by titanic and powerful cosmic events. The great physicist believed that no equipment would ever be sensitive to detect these fain.....»»
In a First, an "Atomic Fountain" Has Measured the Curvature of Spacetime
The atom interferometry technique uses the effects of time dilation to reveal subtle changes in gravity’s strength -- Read more on ScientificAmerican.com.....»»
What Is Spacetime Really Made Of?
Spacetime may emerge from a more fundamental reality. Figuring out how could unlock the most urgent goal in physics—a quantum theory of gravity -- Read more on ScientificAmerican.com.....»»
Gravitational Waves Should Permanently Distort Spacetime
Physicists have linked the “gravitational memory effect” to fundamental cosmic symmetries and a potential solution to the black hole information paradox......»»
Spacetime crystals proposed by placing space and time on an equal footing
A Penn State scientist studying crystal structures has developed a new mathematical formula that may solve a decades-old problem in understanding spacetime, the fabric of the universe proposed in Einstein's theories of relativity......»»
Wormhole Tunnels in Spacetime May Be Possible, New Research Suggests
There may be realistic ways to create cosmic bridges predicted by general relativity -- Read more on ScientificAmerican.com.....»»
Researchers use optical data to reveal the basic structure of spacetime in rotating frames
One of the most basic structural aspects of relativistic spacetime is the description of how time and distances are altered by motion. The theory of special relativity describes a spacetime framework for linear constant motion in which time dilates a.....»»
Microscopic Wormholes Possible In Theory
An anonymous reader quotes a report from Phys.Org: Wormholes play a key role in many science fiction films -- often as a shortcut between two distant points in space. In physics, however, these tunnels in spacetime have remained purely hypothetical......»»
Microscopic wormholes possible in theory
Wormholes play a key role in many science fiction films—often as a shortcut between two distant points in space. In physics, however, these tunnels in spacetime have remained purely hypothetical. An international team led by Dr. Jose Luis Blázquez.....»»
Galaxy-Size Gravitational-Wave Detector Hints At Exotic Physics
The fabric of spacetime may be frothing with gigantic gravitational waves, and the possibility has sent physicists into a tizzy. A potential signal seen in the light from dead stellar cores known as pulsars has driven a flurry of theoretical papers s.....»»
A new way to look for gravitational waves
In a paper published today in Physical Review Letters, Valerie Domcke of CERN and Camilo Garcia-Cely of DESY report on a new technique to search for gravitational waves—the ripples in the fabric of spacetime that were first detected by the LIGO and.....»»