Scientists at CERN observe three "exotic" particles for first time

Scientists working with the Large Hadron Collider (LHC) have discovered three subatomic particles never seen before as they work to unlock the building blocks of the universe

A decade ago, the Large Hadron Collider, Earth's most powerful particle accelerator, proved the existence of an subatomic particle called the Higgs boson

thought to be a fundamental building block of the universe dating back to the big bang billions of years ago.

Now, physicists at the European Organization for Nuclear Research (CERN) on the Swiss-French border are restarting the collider with the aim of understanding more about the Higgs boson

other subatomic particles and the mysteries of dark matter -- an invisible and elusive substance that can't be seen because it doesn't absorb, reflect or emit any light.

Consisting of a ring 27 kilometers (16.7 miles) in circumference, the Large Hadron Collider -- located deep underneath the Alps -- is made of superconducting magnets chilled to ‑271.3°C (-456 F)

which is colder than outer space. It works by smashing tiny particles together to allow scientists to observe them and see what's inside.