The universe

Clumps of dark matter reveal their presence by distorting the shapes of more distant galaxies, just like waves on the surface of a swimming pool distort the pattern of tiles on the bottom.

A new study calls for "geoconservation" principles applied to space, so that astronauts exploring Mars and other cosmic bodies don't compromise future scientific work.

Scientists think they've uncovered a cosmic "glitch" in gravity that could require a revision in Einstein's theory of general relativity.

The presence of manganese oxide on Mars has positive implications in the search for life beyond Earth.

The annual Humans to Mars Summit takes place next week, with talks focusing on establishing a sustainable and permanent human presence on the Red Planet by the mid-2030s.

Citizen scientists have spotted a truly remarkable planet in a binary system's habitable zone. They gave a Harry Potter-inspired nickname.

Newly emerged sunspot fires off X-class and an M-class solar flares in relatively quick succession. Watch the striking video and read about the possible effects here.

NASA's Lucy spacecraft serendipitously found a small moonlet orbiting the mission's asteroid target Dinkinesh. Scientists named it Selam, and have now learned that Selam is a cosmic toddler.