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.
from General Physics News - Science News, Physics News, Physics, Material Sciences, Science https://ift.tt/30sj6lE
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