Protons begin circling as Large Hadron Collider switches on

The World

The Large Hadron Collider was built to explain the mysteries of the universe ? what everything is made of and how the universe is held together. On its first day of operation, scientists circulated a beam of protons around the collider’s 27 km tunnel. Eventually, scientists will introduce another beam traveling in the opposite direction, both traveling close to the speed of light. What happens when the two beams collide? The Takeaway talks with BBC science correspondent Tom Feilden. Guest: Tom Feilden, BBC Science Correspondent

Help keep The World going strong!

The article you just read is free because dedicated readers and listeners like you chose to support our nonprofit newsroom. Our team works tirelessly to ensure you hear the latest in international, human-centered reporting every weekday. But our work would not be possible without you. We need your help.

Make a gift today to help us reach our $25,000 goal and keep The World going strong. Every gift will get us one step closer.