Time travel has long been a staple of science fiction, captivating imaginations with the possibility of moving through time as easily as we travel through space. However, the question remains: how ...

The original version of this story appeared in Quanta Magazine. At the turn of the 20th century, the renowned mathematician David Hilbert had a grand ambition to bring a more rigorous, mathematical ...

At least two people were killed and eight wounded when a shooter opened fire during exams today at Brown University in Providence, Rhode Island, according to officials. Follow for live updates.