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

Invest in independent global news

The World is an independent newsroom. We’re not funded by billionaires; instead, we rely on readers and listeners like you. As a listener, you’re a crucial part of our team and our global community. Your support is vital to running our nonprofit newsroom, and we can’t do this work without you. Will you support The World with a gift today? Donations made between now and Dec. 31 will be matched 1:1. Thanks for investing in our work!