What if we've been thinking about dark matter all wrong, scientist wonders

Orange, blue, purple, and green bursts of light are shown over the glow of stars in a deep space image.

Dark matter could be made from tiny black holes formed when so-called "dark baryons" collapse, scientists suggest. Or, alternatively, dark matter could be a type of particle created by a form of Hawking radiation on the cosmic horizon.

Here's what all that means.