If dark matter is invisible, then how do we detect it?

Because dark matter has mass, it does interact with normal matter — including photons (light) — via gravity.

Hubble Detects Smallest Known Dark Matter Clumps

Dark matter New Scientist

Web Extra: Ripples in space

Could massive gravitons be viable dark matter candidates?

Scientists rule out a popular alternative theory to dark matter

The Real Reality Show: March Headlines

Cosmic food fights

Searching for Dark Matter with the ATLAS detector

既然暗物質不會發光天文學家如何探測它們？ - 國際- 中時新聞網

Nearby galaxy is a “fossil” from the early universe

News, Page 7 of 674

Have we detected dark energy? Cambridge scientists say it's a

How dark matter became a particle – CERN Courier