Astronomers posed over the past decade that dark comets, or objects that resemble asteroids but move like comets, may exist.

Snow dots the Martian landscape in these images from ESA's Mars Express orbiter and NASA's Mars Reconnaissance Orbiter.

it was cold enough for water to freeze into ice. "Dark comets are a new potential source for having delivered the materials ...

Melting Antarctic ice continues to cause sea levels to rise, with the potential to affect millions of people living along ...

NASA's discovery of dark comets reveals potential origins of life on Earth, but their unpredictable orbits raise concerns ...

Fossils from Greenland's icy heart reveal it was a green tundra covered in flowers less than 1 million years ago —Giant viruses discovered living in Greenland's dark ice and red snow Since 2020 ...

Dark comets are a newly defined type of near-Earth object that resemble asteroids but behave like comets, exhibiting dynamic ...

If Brown’s hidden world is real, Rubin will almost certainly find it or strong indirect evidence that it exists. “In the ...

When sunlight heats the carbon dioxide ice at the south pole of Mars in summer, the ice begins to sublimate, i.e., turn from ...

4, 2024 — Neptune is fondly known for being a rich blue and Uranus green -- but a new study has revealed that the two ice giants are ... 31, 2023 — A Neptune-sized planet denser than steel ...