The universe is getting colder as it expands
The Big Bang Theory is the leading explanation of how everything was created. It contains several predictions and theories about why the universe works the way it works. However, it is still only a theory and will probably take centuries to prove even a few aspects of what it proposes.
One of the theory’s proposals is that the universe is cooling as it expands. In 2013, researchers managed to prove this recently when they measured its temperatures. It is currently –270.27 degrees, which is 2.35 degrees cooler than it was the last time they took its temperature.