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פתח הכל

Selling cheap: Abandoned, half-finished, would-be Collider facility

The initial asking price for the 135-acre property in Texas that two decades ago was supposed to be the site of the world's most powerful particle accelerator, the Superconducting Super Collider

Selling cheap: Abandoned, half-finished, would-be Collider facility

Earth's wild ride: Our voyage through the Milky Way

For billions of years, Earth has been on a perilous journey through space. As our planet whirls around the sun, the whole solar system undertakes a far grander voyage, circling our island universe every 200 million years. Weaving our way through the disc of the Milky Way, we have drifted through brilliant spiral arms, braved the Stygian darkness of dense nebulae, and witnessed the spectacular death of giant stars.

Earth's wild ride: Our voyage through the Milky Way

Single particle is the smallest Stirling engine yet

The 200-year-old Stirling engine has inspired a power generator made of a single particle just 3 micrometers wide. Overshadowed by its steam and internal combustion brethren, the Stirling engine is a quiet, efficient alternative that compresses a fixed amount of gas inside a cylinder

Single particle is the smallest Stirling engine yet

String-theory calculations describe birth of the universe

Researchers have developed what may be the first string-theory model with a natural mechanism for explaining why our universe would seem to exist in three spatial dimensions if it actually has six more. According to their model, only three of the nine dimensions started to grow at the beginning of the universe, accounting both for the universe's continuing expansion and for its apparently three-dimensional nature. Read the associated Physical Review Letters abstract

String-theory calculations describe birth of the universe

Astronomers find evidence of a special direction in space

The universe has no center and no edge, no special regions tucked in among the galaxies and light. No matter where you look, it's the same - or so physicists thought. This cosmological principle - one of the foundations of the modern understanding of the universe - has come into question recently as astronomers find evidence, subtle but growing, of a special direction in space

Astronomers find evidence of a special direction in space

Physicists find that an ultrahigh-energy proton looks like a black disk

What does a proton look like? The common answer to this question is that protons are much too small to scatter light, and since light is necessary for us to see things, protons do not "look" like anything. But in a new study, physicists have gathered sufficient evidence to show that, at least at very high energies, the proton is a black disk - sort of an elongated hockey puck. Read the associated Physical Review Letters abstract

Physicists find that an ultrahigh-energy proton looks like a black disk

LHC: Higgs boson may have been glimpsed

The most coveted prize in particle physics - the Higgs boson - may have been glimpsed, say researchers reporting at the Large Hadron Collider (LHC) in Geneva. The particle is purported to be the means by which everything in the Universe obtains its mass. Scientists say that two experiments at the LHC see hints of the Higgs at the same mass, fueling huge excitement

LHC: Higgs boson may have been glimpsed