Scientists find evidence our solar system may have had two suns. For decades, astronomers have speculated that our Sun has an evil twin reffered to as Nemesis. A dwarf star responsible for hurling objects from the outer solar system towards our planet. In fact, Nemesis may even have been responsible for mass extinctions that have rocked Earth for millions of years. A binary star is a star system consisting of two stars orbiting around their common barycenter. Now a team of researchers from the Universities of Harvard and Berkeley has conducted a study whose results suggest that all stars are born forming binary systems and that our Sun would not be an exception. Inspired by this fact, astronomers have analyzed a hypothesis formulated decades ago by physicist R. A. Muller which suggests that our Sun has an undetected partner, called Nemesis, capable of generating disturbances in the Oort Cloud with devastating consequences for the inner parts of our solar system. In fact, this would even explain the deadly cycle of mass extinctions that occurs every 27 million years. Back in the 1980's, experts noticed that mass extinction events on our planet, seemed to follow a cyclical pattern. After several studies, scientists were able to calculate that mass extinctions on Earth occur every 27 million years. This raised numerous questions and the long pauses between events made them turned towards the universe to look for an explanation. Then, a scientist called Richard Muller, from the University of California Berkeley, proposed that the perpetrator could be a twin of the Sun dwelling 1.5 light-years away. While no evidence has ever been found that Nemesis exists, a new study has offered a glimpse of hope by proving that all stars and even our Sun are born with a twin, meaning that somewhere out there, our solar system's second Sun may stll lurk undetected. Stay Tuned!