Time travel could be possible, but only with parallel timelines

Have you ever made a mistake that you wish you could undo? Correcting past mistakes is one of the reasons we find the concept of time travel so fascinating. As often portrayed in science fiction, with a time machine, nothing ...

How do we know that time exists?

The alarm goes off in the morning. You catch your morning train to the office. You take a lunch break. You catch your evening train back. You go for an hour's run. Eat dinner. Go to bed. Repeat. Birthdays are celebrated, ...

page 3 from 40