Galaxies without dark matter are rare and were once thought impossible. Find out how a new hypothesis about their formation may explain how all galaxies form and what dark matter is.
Fast radio bursts (FRBs) are a mystery in themselves. Find out how they enabled scientists to determine the mass of conventional matter in the Universe. (4:30 read time)
Scientists from the Chinese Academy of Sciences have identified 19 dwarf galaxies that appear to contain none of cosmology's mysterious dark matter. Learn why this challenges the conventional wisdom about the workings of our universe. (4:00 min read)