With a small side project, astronomers discover a new type of galaxy.
See cosmologist Risa Wechsler's answers to readers' questions about dark matter and dark energy.
A previously detected, anomalously large X-ray signal is absent in new Hitomi satellite data, setting tighter limits for a dark matter interpretation.
How do scientists know what percentages of the universe are made up of dark matter and dark energy?
In its final run, the LUX experiment increased its sensitivity four-fold, but dark matter remains elusive.
Analyzing the motion of X-ray sources could help researchers identify dark matter signals.
The LUX experiment has drawn the best picture yet of what dark matter particles cannot be.
Scientists don’t yet know what dark matter is made of, but they are full of ideas.