Time travel is deterministic and locally free, a paper says—resolving an age-old paradox. This follows research observing that the present is not changed by a time-traveling qubit. It’s still ...

A decades-old photo has been doing the rounds on Reddit, with users convinced that it is evidence of time travel thanks to ...

Scientists have long known that light can sometimes appear to exit a material before entering it – an effect dismissed as an ...

NOVA: Do you think that backwards time travel will ever be possible? Hear Sagan via RealAudio Sagan: Such questions are purely a matter of evidence, and if the evidence is inconsistent or ...

Proof of time travel? Many people are intrigued after spotting a fascinating detail in Portrait of a Boy, a 400-year-old painting by Dutch master Ferdinand Bol. The subject, a young boy, appears to be ...