[SubMareener]

I was unaware of any theory that postulates more than three space dimensions. Even the 12 dimensional Heim Extended Quantum Field Theory has only three space dimensions. The rest are “time-like”.

[faithhopecharity]

Just as well. Humans haven’t figured out how to live properly in the four dimensions we already got.

[Ciaphas Cain]

The peer review of this study is being called into question by Dr. Reed Richards.

A press conference has been called for later this coming week at the Baxter Building. Richards is also expected to elaborate on his recent remarks that Annihilus is a graver threat to Earth than climate change.

[Leaning Right]

So they couldn't find any evidence for extra spatial dimensions. OK. But here's what I want to know. Did they find any evidence for turtles?

[Islander7]

Someone has to say it, Well, DUH!

[Moonman62]

Wouldn’t this be a blow for string theory and the multiverse?

[Moonman62]

The major difference between the two is that astronomers could see the aftermath of the neutron star collision with a conventional telescope, producing two readings that can be compared: one in gravity, and one in electromagnetic (light) waves.

“This is the very first time we’ve been able to detect sources simultaneously in both gravitational and light waves,” said Prof. Daniel Holz. “This provides an entirely new and exciting probe, and we’ve been learning all sorts of interesting things about the universe.”

...

It’s one of the greatest accomplishments of humanity.

Too bad John Wheeler didn’t live long enough to see it.

[Moonman62]

Here’s a link to the paper:

https://arxiv.org/abs/1801.08160

It says the dimensions considered are non-compact, so perhaps this isn’t a blow for string theory.

[I want the USA back]

Dimensions are not a place where you can go. Dimension means measure. Like “foot” or “mile.”

[Pride in the USA]

Very interesting.

[mjp]

t appears for now that the universe has the same familiar dimensions—three in space and one of time—even on scales of a hundred million light-years.

I am disappointed. I enjoyed the idea that a being that existed in 4 or more dimensions could enter our three dimensional universe and appear to walk thru walls and do other miraculous things.

[beethovenfan]

I knew it all along.

[Georgia Girl 2]

Well so much For quantum physics. Just forget about it.

[adorno]

Logically, there cannot be a multi-verse, or multiple universes.

Universe means "encompassing everything", which means that, even if there were something out there that looks like our universe (as we see and measure it), then, that other instance of a "universe" is nothing more than, part of the "everything", or the real all-encompassing universe.

What we don't see or understand, can make our imaginations run wild, and so, we come up with dramatic new theories to make our minds run wild to further come up with evem bigger imaginings. Our imaginations create huge numbers of theories, but, many or most will remain theories, and not real universal realities.

[Vaduz]

Theory is a toy of the mind only when facts are found then it truth.Thinking is a good thing unless it’s group thinking.

[dfwgator]

[P.O.E.]

IIRC, one of the problems of theories about what goes on at such small levels was the difficulty in testing them.