7 Mysterious Blueberries
In 2004, NASA’s Opportunity rover cruised around Mars. After a few months, it encountered something curious—tiny spheres—which scientists do not understand to this day. Working with false-color photographs that turned the spheres blue, researchers puzzled over the mysterious “blueberries” scattered around the Martian surface.
Which geological forces created them, and what did that reveal about the planet’s past environment?
Recently, researchers pounced on the nearest places that resembled the red wonder—Mongolia and Utah. To everyone’s excitement, they found something similar. The minuscule globes on Earth had calcite cores encased in iron and were likely shaped by a lengthy exposure to moving water. The “river pebble” look suggested that a lot of water had flooded the blueberry region.
Scientists cannot be sure of the chemical makeup of the Martian spheres. If they can crack that riddle, it might reveal the chemistry of the water that crafted them and whether the region was habitable. In other words, they may discover if the water encouraged any form of life.