Evidence of alien life on Mars may have already been found by Nasa’s rover but scientists failed to notice, a new study suggests
In 2007, the Spirit rover photographed intriguing finger-like rock formations at the Home Plate plateau, a 300 square foot area in the Gusev crater near the Martian equator.
Scientists from the University of Arizona decided to look for similar features on Earth to determine how they were formed, and found nearly identical structures at El Tatio, Chile, which were created by a combination of hot springs and crucially, micro-organisms.
The team chose to study El Tatio because it has conditions which are very like Mars. Situated at 14,000 feet above sea level even in summer temperatures often drop below freezing at night, and by day huge amounts of ultraviolet light from the Sun comes through the thin, dry air.