The infinite hotel paradox imagines a hotel with endless rooms that somehow runs out of space. Even when new guests arrive, ...

Time travel has been the staple science fiction books and movies for many years. Most who have read or watched content focusing on time travel knows about the paradox issue. Perhaps the best example ...

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 not very ...

For centuries, mathematics was seen as the one discipline immune to contradiction — until one man proved it wasn’t. In the ...