Did the universe have a beginning?

[petrushka.googol]

According to string theory there is no time before Planck time and no length (dimension) smaller than Planck Length.

 

According to Hawking space time evolved from a singularity.

If we truly try to apply theory of conservation of energy it points to a violation.

 

After all if nothing is smaller than Planck Length then some finite mass must have been present at Planck time.

 

Which implies some finite energy must have converted into mass at this point.

 

But can we create energy out of nothing.

 

Here we have a situation where there is finite mass in finite time with energy of unknown origin.

 

Where did this energy come from?

 

Any pointers?

 

Thanks in advance.

[Airbrush]

"....But can we create energy out of nothing.

 

Here we have a situation where there is finite mass in finite time with energy of unknown origin.

 

Where did this energy come from?"

 

What you call "nothing" is not absolutely so. Energy comes from SOMETHING, even if that something seems like nothing.

 

According to string theory this energy comes from a collision of higher dimensions.

Edited October 6, 2013 by Airbrush