Medicine & TechnologyCassini data unveils Mimas' secret: a global ocean formed less than 2-3 million years ago, hidden 20-30 km beneath its icy surface. Read the article for more details.
Stars passing close to our solar system could send comets hurdling toward Earth increasing the risk of impact altering life as we know it. Scientists still say there is not much for us to worry about as these collisions won't happen for hundreds of thousands of years.