What mysteries of the Universe remain to be explored? What technologies will allow us to go further? And how do we decide which scientific instruments to build for the future?

With Why? It matters, CERN invites visitors to discover the discussions and reflections shaping the future of particle physics today.

From fundamental scientific questions and future accelerators to technological challenges, international cooperation and impacts on society and local communities, the exhibition offers a glimpse into an ongoing process — and invites everyone to consider what matters when imagining the future of research.

Practical information

• Dates: from 8 October 2026 to 28 February 2027
• Location: Globe of Science and Innovation, Science Gateway Campus, CERN
• Opening hours: Tuesday to Sunday, 9.00 to 17.00
• Languages: English and French
• Recommended age: 8 years and over