Alternatives to the Big Bang Theory (infographic)

The Big Bang Theory is the primary explanation for how the universe began 13.8 billion years ago. Though it is the leading explanation, some theorists have come up with alternative ideas or extensions to the Big Bang Theory. We explore some of these theories in the detailed infographic below. 

To investigate how the universe came into existence, we first need to ask what exactly is it? The term “observable universe” refers to everything that we can see, according to NASA