1. Big Crunch. This theory says gravity will eventually slow the expansion of the universe and cause it to collapse on itself, eventually having all matter pressed into one singularity and probably causing another big bang. Repeat forever.
2. Big Freeze. The theory says gravity will not stop the expansion of the universe. Since it keeps expanding forever, eventually all fuel will be used up leading to the heat death of the universe.
3. Big Rip. This theory uses the "newly" discovered dark matter, which has so much energy the expansion of the universe keeps accelerating. Eventually even the atoms in your body will rip apart as they accelerate away from each other. Think of an expanding balloon with an infinite number of dots on it - each dot expands away from all others.
Which theory do you believe in?
In the past year, a number of scientists had announced if they have managed to find a subatomic particle that has long been sought. This shows how particles get their mass material. Researchers continue to conduct an analysis of the Higgs Boson particle with a view to ensuring the character of these particles to arrive at the derived particles. So researchers can make sure if they have actually found particles that were once only limited to pure theory.