A new study could provide the solution to the grandfather paradox that has plagued time travel theories for decades.
Two people cheat on their partners with each other and then leave their partners to be together. Should they trust each other ...
Purpose boosts health and happiness, yet 91 percent of us feel anxious chasing it. What if we've misunderstood purpose entirely?
A physicist believes he may have solved the notorious "grandfather paradox", suggesting that time travel to the past may not ...