A set of dark streaks that regularly wind across the Martian surface are more likely to be formed by dust and wind than by ...

Mars, the other world, followed a different path. Today the Martian surface is hostile to life as we know it, but as this scientific story goes, Mars may have once hosted a rich abundance of microbes.

Jezero Crater trek. Credit: NASA/JPL-Caltech ...

For years, scientists have puzzled over how Mars lost the thick atmosphere it once had. That atmosphere was essential for ...

Strange, dark streaks on Martian slopes that once hinted at flowing water are now believed to be dry dust slides, revealed ...