Dwarf Galaxy No Missing Matter

"Missing Matter" Missing in 19 Dwarf Galaxies

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)

Planet X

Is Planet X a Black Hole?

Scientists have been proposing a new "Planet X" in our solar system. Now two scientists suggest that it's a black hole. Find out why. (3:30 min read)