Oxidized iron is responsible for the colour of rocks on Earth similar to those found on Mars. It is also what makes the blood red. The green tinge is also common in rocks on our planet.

NASA's Curiosity rover taking a picture of itself on Mars. (Photo/NASA/JPL) At the surface, Mars is a desolate, barren world with a rocky landscape, massive dust storms and extreme temperature swings.

Similar mechanisms are now being considered for the findings on Mars. Due to safety constraints, Perseverance couldn’t get its SHERLOC and PIXL instruments close enough to the green spot for a ...

However, Dr. Scott Solomon, a biologist at Rice University, sees drastic mutations in humans born on Mars, potentially leading to green skin, weaker eyesight, and brittle bones due to radiation an ...