Otto Rössler (1940) is a German biochemist known for his work on chaos theory and the theoretical equation known as the Rössler attractor. Rössler has authored hundreds of scientific papers in fields as wide-ranging as biogenesis, the origin of language, differentiable automata, chaotic attractors, endophysics, micro relativity and artificial universes. In 2008, Rössler publicly criticized the Large Hadron Collider experiment in Geneva and was involved in a failed lawsuit to halt it.