Scientists suggest our universe is merging with ‘baby universes’ as possible theory of expansion

Astronomers have proposed a new theory to suggest why our universe is expanding at an accelerating rate. 

That our universe is expanding, is in wide agreement, though how exactly that process happens is not as well understood. Scientists believe that an elusive substance called "dark energy" is responsible for driving the expansion.

But the very existence of dark matter is only ever discussed in the context of an expanding universe, leading some to question whether there are other causes of expansion. 

A study published in the Journal of Cosmology and Astroparticle Physics, proposed that the universe’s expansion is driven by merging...