Add Yahoo as a preferred source to see more of our stories on Google. Most people have never heard of vacuum decay, but if it happened it would be the biggest natural disaster in the universe. Sure, ...

Most people have never heard of vacuum decay, but if it happened it would be the biggest natural disaster in the universe. Sure, an asteroid could destroy a city or wipe out life on Earth. A supernova ...

Nearly 50 years ago, physicists floated a bold idea: our universe might be stuck in a false vacuum. This state feels stable, but deep down, it's not. Over enormous timescales, it could suddenly tip ...