New York: The strange grooves criss-crossing the surface of the Martian moon Phobos were made by rolling boulders blasted free from an ancient asteroid impact, suggests a new study. Phobos’ grooves, which are visible across most of the moon’s surface, were first identified in the 1970s by NASA’s Mariner and Viking missions. Also Read Researchers … Continue reading Decoded: How Mars moon Phobos got its grooves?