Dark matter is only known by its effect on massive astronomical bodies, but has yet to be directly observed or even identified. A theory about what dark matter might be suggests that it could be a particle called an axion and that these could be detectable with laser-based experiments that already exist. These laser experiments are gravitational-wave observatories.
Click here for original story, New hunt for dark matter: Physicists theorize a novel way to explore the nature of dark matter with lasers
Source: Phys.org