Imagine a time when the entire universe froze. According to a new model for dark energy, that is essentially what happened about 11.5 billion years ago, when the universe was a quarter of the size it is today.
General Physics
May 8, 2009
15
0
The nature of dark energy is one of the most important unsolved problems in all of science. But what, exactly, is dark energy, and why do we even believe that it exists?
Astronomy
Apr 23, 2015
23
167
Who has never dreamt of having a machine that can materialise any object we need out of thin air at the push of a button? Such machines only exist in the minds of science fiction enthusiasts and the film industry. The most ...
General Physics
Jun 30, 2015
22
217
Futuristic ideas for the use of superconductors, materials that allow electric current to flow without resistance, are myriad: long-distance, low-voltage electric grids with no transmission loss; fast, magnetically levitated ...
Superconductivity
Sep 10, 2010
0
0
Cracks permeate the dried-out desert ground, the landscape bears testimony to the lack of water. But even here, where there are no lakes, rivers or groundwater, considerable quantities of water are stored in the air. In the ...
Engineering
Jun 5, 2009
12
0
Solar cells could soon be produced more cheaply using nanoparticle "inks" that allow them to be printed like newspaper or painted onto the sides of buildings or rooftops to absorb electricity-producing sunlight.
Nanomaterials
Aug 24, 2009
12
0
Billions of tiny transistors supply the processing power in modern smartphones, controlling the flow of electrons with rapid on-and-off switching.
General Physics
Dec 10, 2018
0
541
Quintessence and phantom fields, two hypotheses formulated using data from satellites, such as Planck and WMAP, are among the many theories that try to explain the nature of dark energy. Now researchers from Barcelona and ...
General Physics
Mar 26, 2014
67
0
One of the greatest problems in modern physics is to reconcile the enormous difference between the energy carried by random fluctuations in the vacuum of space, and the dark energy driving the universe's expansion.
General Physics
Mar 6, 2024
4
824
(Phys.org)—Researchers from Canada, California, and Poland have devised a straightforward way to test an intriguing idea about the nature of dark energy and dark matter. A global array of atomic magnetometers – small ...
General Physics
Jan 7, 2013
9
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