Radical theory says our universe sits on an inflating bubble in an extra dimension
Cosmologists propose a groundbreaking model of the universe using string theory.
- A new paper uses string theory to propose a new model of the universe.
- The researchers think our universe may be riding a bubble expanded by dark energy.
- All matter in the universe may exist in strings that reach into another dimension.
Our universe may be having itself quite a great time it seems. Cosmologists from Uppsala University came up with a new model that proposes the universe may be riding on an ever-expanding bubble in an extra dimension.
In particular, according to this theory, published in Physical Review Letters, the researchers offer a novel explanation for how the universe may be getting bigger. The fact of its accelerating expansion has been known for about the past 20 years but the explanation for that has relied rather unsatisfyingly on the mysterious "dark energy".
In their new paper, the Swedish scientists approach this topic from the direction of string theory, which maintains that all matter is made of tiny vibrating strings. The theory also allows for the existence of extra dimensions, in addition to the three spatial ones we experience on a daily basis.
The groundbreaking new idea by the researchers says that the universe may be sitting on the edge of an expanding bubble, while all matter exists on strings that reach outward from it into an extra dimension. Dark energy would be the inflating force in this bubble, the existence of which is supported by string theory, claim the scientists.
In case you're wondering, they think such bubbles should be rather stable, writing there's "a strong indication in favor of the stability of these bubbles."
Perhaps even more excitingly, there could be more bubbles than just the one with our universe on it. Each one of those carrying another universe.
'In this context, the cosmology we see as 4D observers is not due to vacuum energy, but rather arises as an effective description on a dynamical object embedded in a higher dimensional space,' the researchers explain.
The Uppsala University team included Souvik Banerjee, Ulf Danielsson, Giuseppe Dibitetto, Suvendu Giri, and Marjorie Schillo.
As they write in their paper, black holes can also be re-defined by this new theory:
"Gravitational collapse of the string endpoints in four dimensions results in an unstable black string solution in five dimensions," state the scientists.
Check out their research for yourself here.
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What can 3D printing do for medicine? The "sky is the limit," says Northwell Health researcher Dr. Todd Goldstein.
- Medical professionals are currently using 3D printers to create prosthetics and patient-specific organ models that doctors can use to prepare for surgery.
- Eventually, scientists hope to print patient-specific organs that can be transplanted safely into the human body.
- Northwell Health, New York State's largest health care provider, is pioneering 3D printing in medicine in three key ways.
The tactics that work now won't work for long.
Great ideas in philosophy often come in dense packages. Then there is where the work of Marcus Aurelius.
- Meditations is a collection of the philosophical ideas of the Roman Emperor Marcus Aurelius.
- Written as a series of notes to himself, the book is much more readable than the dry philosophy most people are used to.
- The advice he gave to himself 2,000 years ago is increasingly applicable in our hectic, stressed-out lives.
By working together, and learning from one another, we can build better systems.
- Many of the things that we experience, are our imagination manifesting into this physical realm, avers artist Dustin Yellin.
- People need to completely rethink the way they work together, and learn from one another, that they they can build better systems. If not, things may get "really dark" soon.
- The first step to enabling cooperation is figuring out where the common ground is. Through this method, despite contrary beliefs, we may be able to find some degree of peace.
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