Other contributors have said "What are two evidence that supports the big bang theory?" is the same question as "What two key pieces of evidence support the big bang theory?" If you believe that these are not asking the same thing and should be answered differently, click here
What two key pieces of evidence support the big bang theory?
All the Galaxies are drifting away so they all were once in the same place. In all directions one can detect "background radiation" which is a residual from the Big Bang.
"The first piece of evidence for the Big Bang theory was the expansion of the universe. The second piece of evidence is called 'Cosmic background radiation'. "
There are none. God created the world.That our Universe has, for the last 13.7 billion years, been expanding at pretty much a constant rate, is pretty much irrefutably shown by Hubble's Constant and...
The big bang is a widely accepted starting point for the universe. Experimental evidence strongly supports the evolution of the universe from a single hyper dense point. The first piece of...
The big bang theory is that our Universe began with an expansion of space (NOT an explosion of matter into space) that continues to this day at a rate that has remained fairly constant over the last...