A photon emitted from a star a billion light-years away arrives at a telescope having experienced no time whatsoever. Not ...

Recent scientific breakthroughs are making concepts once confined to science fiction, like time travel, seem tantalizingly closer to reality. From the potential of humans living to 1,000 years to the ...

Every generation grows up with starships that jump across galaxies in a heartbeat, but the real universe is far less forgiving than the screen. The same physics that lets GPS satellites work and ...