Dark matter 'smoother' than first thought, study discovers

Dark matter, the mysterious substance believed to comprise a quarter of our universe, is spread out more smoothly than previously thought, said a study on Wednesday that may challenge some tenets of physics.

The finding may throw into question what little we know about the birth and growth of the cosmos, astronomers said.

"All we can say for now is that something appears to be not quite right," study co-author Konrad Kuijken of the Leiden Observatory in the Netherlands told AFP.