33K views · 1.4K reactions | Since 2003, a LHC dipole magnet turned into a telescope has been following the Sun's movements from behind a concrete wall. This is the CAST experiment - hunting for hypothetical "axion" particles that could be produced in the centre of our star ☀️ Find out more about this experiment: https://home.cern/science/experiments/cast | CERN | Facebook

The LHC tunnel and that of its successor, the High-Luminosity LHC, are now connected. This week, the civil engineering companies made the junction between the underground facilities at Points 1 and 5 of the accelerator. Lucio Rossi, Leader of the HL-LHC project, Frédérick Bordry, Director for Accelerators and Technology, Fabiola Gianotti, CERN Director-General, and Oliver Brüning, Deputy Leader of the HL-LHC project, met this morning in the LHC tunnel to celebrate the breakthrough. Find out more

75K views · 374 reactions | It's one of the biggest machines in the world. But CERN scientists want an even bigger particle accelerator  Check out BBC CrowdScience for more: https://bbc.in/2XoRJaS | BBC World Service | Facebook