Very-high-energy (VHE >~100 GeV) gamma rays are absorbed in Earth's atmosphere and thus cannot be detected directly on Earth. Their fluxes are also typically too low to efficiently study them with satellite instruments. A VHE gamma ray entering the atmosphere initiates an electromagnetic cascade that induces faint flashes of blueish Cherenkov light

The MAGIC telescopes are a stereoscopic system of two 17m mirror diameter Cherenkov telescopes for gamma-ray observations, in operation since many years on the island of La Palma at the Observatorio del Roque de los Muchachos. A new installation allows us to use those telescopes as optical intensity interferometer which enables us to measure the

Axion detection would be one of the most exciting moments in the entire history of science. This hypothetical particle can simultaneously explain two fundamental problems in Modern Physics: the mystery of dark matter and the CP problem of the strong interaction. In this talk, I will provide an overview of the status for the search for axions and I