Salto the jumping robot can take a flying leap and land on a narrow pipe — just like a squirrel soaring from branch to branch.

March 20 is International Happiness Day — a day that the United Nations had dedicated to the celebration of joy. We asked ...

Read more of Whose Cold War? Sheila Fitzpatrick I woke up yesterday morning to a message from a friend in Karachi. It just said: ‘They’ve started again.’ I did not wonder who ‘they’ were. He could ...