Astronomy
Mapping Dark Matter in Galaxy Clusters with Gravitational Lensing
Quick fact
By measuring how galaxy clusters distort the light from galaxies behind them, astronomers have created the first direct maps of dark matter, showing that it often forms clumps and filaments far beyond the cluster's visible galaxies.
Why this is interesting
Have you ever seen a spoon look bent in a glass of water? Now imagine the entire universe bending light—and using that distortion to see things that are truly invisible.