Add Yahoo as a preferred source to see more of our stories on Google. Those concerned that 3I/ATLAS' arrival to our solar system meant that some sort of alien invasion was imminent can breathe a sigh ...

A comet that is likely much, much older than our solar system has spent months traipsing through Earth's cosmic neighborhood. And at long last, NASA has unveiled an unprecedented look at the object, ...

A mysterious ‘alien spaceship’ that was said to be glowing like a "car turning on its headlights" and believed to be heading towards Earth turned out to be much less interesting. Scientists who fired ...