For years, scientists staring at Mars through the eyes of orbiting spacecraft noticed something strange: a mysterious signal in the light spectrum that didn’t match any known mineral. That puzzling ...

They look like a dish of lentils, or a mass of spider eggs on a leaf. But whatever they are, these tiny little brown blobs, newly-found on the surface of Mars, have left scientists baffled. New images ...

We've discovered a lot of strange things on Mars, but thus far, conclusive proof of life on the red planet has eluded us. Now, however, NASA has come as close as it ever has to confirming that Mars ...