Add Yahoo as a preferred source to see more of our stories on Google. A new study suggests that time travel would erase your memories, reset clocks, and force strict consistency, leaving no trace of ...

Time travel has long been a topic of science fiction, filled with thrilling possibilities and mind-bending problems. The most famous of these problems is the "grandfather paradox". If someone travels ...

The quantum world operates by different rules than the classical one we buzz around in, allowing the fantastical to the bizarrely normal. Physicists have described using quantum entanglement to ...

The wacky, high-octane sci-fi 2014 movie Edge of Tomorrow has it all: Tom Cruise, alien invasions, the U.S. military-industrial complex, and a shaky grasp of the concept of time. But how realistic is ...

The dream of time travel has fueled stories, films, and scientific debates for generations. The idea that you could step into a machine and reappear in another era has captivated people for as long as ...