Maciej Bilicki

The universe resembles a giant sponge: bright filaments of galaxies weave around enormous dark voids. Inside these filaments and walls hide clumps of invisible dark matter — halos. When dark matter particles collide and decay, they produce ordinary particles that telescopes can catch.

Light from distant galaxies passes through warped space before reaching our telescopes. Massive clumps of matter act like uneven glass: galaxy images get slightly stretched and rotated. This phenomenon is called weak gravitational lensing.