Dunkle Materie (dark matter) is a mysterious substance that makes up about 27% of the universe. Unlike ordinary matter, it does not emit, absorb, or reflect light, making it invisible and detectable only through its gravitational effects. Scientists infer its presence by observing the motion of galaxies and galaxy clusters, which cannot be explained by visible matter alone. Research into Dunkle Materie is crucial for understanding the universe's structure and evolution. Various theories suggest it could be composed of particles like WIMPs (Weakly Interacting Massive Particles) or axions. Ongoing experiments aim to detect these particles and unravel the mysteries of dark matter.