NASA recently shared an image of an unusual hole on Mars on their ‘Share the Science’ portal which was discovered in 2011. The image includes the dusty slope of Mars’ Pavonis Mons volcano and was taken by Mars HiRise orbiter, which is currently orbiting the planet. As per NASA, the hole captured in the image is an opening to an underground cave, which is about 35 meters wide and 20 meters deep. However, what remains a mystery is the circular crater surrounding the hole. As per NASA, such holes are ideal for flourishing Martian life as they are shielded from the harsh surface of the red planet and may attract future space missions. Astronomers believe such holes will be the prime targets for future spacecraft, robots, and even human interplanetary explorers.