Scientists studying five years of data from the Fermi Gamma-ray Space Telescope have found the first gamma-ray variable pulsar. But is it really what it seems?
The distant universe looks a little clearer, thanks to tens of thousands of citizen scientists who classified more than 6 million images over three days.
Using an entire galaxy as a lens to look at an object in the far distance, researchers are learning more about powerful jets emitted when matter falls into a black hole.
