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Archive for the ‘cosmology’ category

Dec 1, 2016

The Missing Universe: CERN Has Started Searching for “Dark Photons”

Posted by in categories: cosmology, particle physics

In Brief

  • Dark matter seems to outweigh visible matter roughly six to one, making up about 27% of the universe.
  • Physicists from CERN now believe there’s a fifth universal force that rules the behavior of dark matter, and is transmitted by a particle called the dark photon.

Nov 29, 2016

The Case Against Dark Matter

Posted by in categories: cosmology, particle physics

A proposed theory of gravity does away with dark matter, even as new astrophysical findings challenge the need for galaxies full of the invisible mystery particles.

Nov 28, 2016

Time travellers could use parallel dimensions to visit the past, scientists claim

Posted by in categories: cosmology, physics, time travel

THERE are multiple timelines playing out in parallel universes, according to a team of researchers.

The sensational claim was made by a team of physicists, who believe that the parallel universes can all affect one another.

Nov 26, 2016

New Theory Shows Interaction Between Parallel Worlds And The Potential To Rewrite Quantum Theory

Posted by in categories: cosmology, quantum physics

The 20th century was loaded with experiments and discoveries that I sometimes forget how big of an impact things like quantum theory really had on our lives. Bold new thought experiments and suggestions have been made that seemingly left us wondering what our universe might be made of after all.

Nov 25, 2016

Why the US Is Losing Ground on the Next Generation of Powerful Supercomputers

Posted by in categories: cosmology, supercomputing

“I feel the need — the need for speed.”

The tagline from the 1980s movie Top Gun could be seen as the mantra for the high-performance computing system world these days. The next milestone in the endless race to build faster and faster machines has become embodied in standing up the first exascale supercomputer.

Exascale might sound like an alternative universe in a science fiction movie, and judging by all the hype, one could be forgiven for thinking that an exascale supercomputer might be capable of opening up wormholes in the multiverse (if you subscribe to that particular cosmological theory). In reality, exascale computing is at once more prosaic — a really, really fast computer — and packs the potential to change how we simulate, model and predict life, the universe and pretty much everything.

Continue reading “Why the US Is Losing Ground on the Next Generation of Powerful Supercomputers” »

Nov 25, 2016

NA64 hunts the mysterious dark photon

Posted by in categories: cosmology, particle physics

One of the biggest puzzles in physics is that eighty-five percent of the matter in our universe is “dark”: it does not interact with the photons of the conventional electromagnetic force and is therefore invisible to our eyes and telescopes. Although the composition and origin of dark matter are a mystery, we know it exists because astronomers observe its gravitational pull on ordinary visible matter such as stars and galaxies.

Some theories suggest that, in addition to gravity, could interact with visible matter through a new force, which has so far escaped detection. Just as the is carried by the photon, this dark force is thought to be transmitted by a particle called “dark” photon which is predicted to act as a mediator between visible and dark matter.

“To use a metaphor, an otherwise impossible dialogue between two people not speaking the same language (visible and dark matter) can be enabled by a mediator (the ), who understands one language and speaks the other one,” explains Sergei Gninenko, spokesperson for the NA64 collaboration.

Nov 17, 2016

Stephen Hawking: Humans will die out within 1,000 years unless we leave Earth

Posted by in categories: cosmology, habitats

Professor Stephen Hawking has warned that mankind will not survive another millenia unless it makes a home beyond Earth’s atmosphere.

The celebrated physicist was addressing a lecture audience at the Oxford Union debating society on Monday evening when he gave the stark warning.

“Most recent advances in cosmology have been achieved from space where there are uninterrupted views of our Universe,” he said “but we must also continue to go into space for the future of humanity.

Continue reading “Stephen Hawking: Humans will die out within 1,000 years unless we leave Earth” »

Nov 10, 2016

What Sonic Black Holes Say About Real Ones

Posted by in categories: cosmology, quantum physics

Can a fluid analogue of a black hole point physicists toward the theory of quantum gravity, or is it a red herring?

Nov 9, 2016

Wormhole entanglement solves black hole paradox

Posted by in category: cosmology

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Nov 7, 2016

A Universe in a Nutshell: The Physics of Everything, with Michio Kaku

Posted by in categories: cosmology, information science, physics

What if we could find one single equation that explains every force in the universe? Professor Michio Kaku explores how physics could potentially shrink the science of the big bang into an equation as small as E=mc².

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