Please could you tell me why top physicists cannot agree on one or infinite number of universes.?

Question

Please don't give me a rational answer. If you do it means you haven't understood the question. At one time 'learned' men argued over how many Angels could sit on the head of a pin.
My two year old Grandson has just given me the right answer.

Answer 1

Rational or not, the *answer* to your question is that there is no hard, scientific evidence supporting the concept of an infinity of universes.

Answer 2

If “universe” means “everything that exists”, it seems obvious there can only be one. But what does it really mean to “exist”? If something is so far away that its light and gravity can never reach us in a googolplex of years, does it really exist? If something is so large that everything yet detected by the Hubble Space Telescope might be contained within a tiny fraction of one of its electrons, does it really exist? If one of our electrons contains billions of galaxies as complex as our own Milky Way, do those galaxies really exist? If the future is not predestined, does it exist? If there is more than one possibility of what our own past might have been, which one exists? Or do they all exist?

These are philosophical or religious questions; but the way we answer them does influence the way we theorize about what lies just beyond our present horizon. It’s good to have competing philosophies because they spawn competing theories, and experimentation can then weed out which theories are correct.

Answer 3

You obviously are misinformed about what physicists spend time arguing about. They tend to avoid arguing about questions whose answers don't have testable implications. Some folks who write for non-scientists like to focus on these questions, because people think they are neat, but that's really not where science is at.

Moreover, I'm sure that 100 years ago people like you would made that same claim that it was pointless to be asking questions like "Are light and electrons particles or waves?" Quantum physics has revolutionized the world we live in from the transistor onward. I could provide many, many examples of phenomena that appeared to be of purely theoretical interest becoming very practical.

Answer 4

Because we can only observe one of these universes - our own. The others, as far as we can tell, only exist in the math, and we haven't been able to check the theory yet. Give us a few years; we have some ideas on how we could check it.

Answer 5

We only have evidence for one universe. It is unlikely that we will ever have evidence for others. More than one universe is mere speculation.

I doubt your 2-year-old grandson can comprehend this.

Answer 6

Anything my mate Steve (Hawking) says must be rght.

Answer 7

Surely one and infinity are exactly the same, aren't they ?

Answer 8

Because there is no way of knowing.

Answer 9

Simpley becuase they dont know...They arn't God

Answer 10

No.