Add Yahoo as a preferred source to see more of our stories on Google. The so-called Candor Tetrahedron. (NASA/JPL-Caltech/UArizona) It would be tempting to assume there's nothing much of note ...

Using images from cameras on Mars orbiters, an international research team has discovered structures on Mars that are very similar to classic river deltas on Earth. These are traces of rivers that ...

New research has uncovered a major mystery deep inside Mars, where differences between the planet’s northern and southern regions reveal an unexpected internal structure. The findings, published in ...