Spiders On Europa Scientists Finally Explain Mysterious 'Wall Demon' On Jupiter's Moon

First spiders on Mars, and now on Europa. Scientists have just solved a nearly 30 year long mystery surrounding a mysterious spider-like demon on Jupiter's fourth largest moon, Europa. On March 29th 1989, NASA's Galileo spacecraft discovered something strange lurking within Europa's Malin Aarne crater, a sprawling spider-like pattern. Until now, scientists could not fully explain what had caused this arachnid-like asterisk, but a new study reveals that it that had likely formed in a similar way to Earth-based structures, known as lake stars, which often appear on the surface of frozen lakes. The spider likely formed when an asteroid cracked Europa's icy surface, allowing salty water from the moon's underground ocean to seep up to the surface. The result is similar to the infamous spiders on Mars, which are created when carbon dioxide ice suddenly evaporates beneath the red planet's surface. The researchers not only recreated the mysterious shape in the lab, but they also gave it a new name, Dauan Alar, which means spider or wall demon in Irish. The new findings could help inform NASA's Europa Clipper mission, which will study the frozen water world beginning in 2030.