Is there a fifth force of nature? For almost a century physicists have suspected “ghost particles” are moving things in mysterious ways. We might be on the cusp of finding them.
Elusive ‘ghost’ in particle machine captured!
Secrets of the universe: “Normal” matter makes up just 5% of all that exists. Glossary
Radioactivity - The release of energy or particles spontaneously by an unstable atomic nucleus.
Subatomic particles - The minuscule pieces of matter that make up atoms. Scientists have discovered 36 so far.
CERN - The European Organisation for Nuclear Research is the scientific body in charge of the Large Hadron Collider.
Big Bang - The moment the universe came into being. It is thought that this took place in a kind of explosion from a dimensionless singularity.
Chicago - One of the biggest cities in the USA.
Dark matter - A hypothetical substance that can not be detected by scientific instruments. Its existence is inferred from evidence that the universe consists of more mass than we can perceive.
Dark energy - An unknown form of energy causing the expansion of the universe to accelerate.
Quintessence - A hypothetical form of dark energy that could explain the accelerating expansion of the universe.