Swiss aviation pioneer Bertrand Piccard is developing a plane powered by liquid hydrogen after a much-hyped flight in 2015 ...

Since operating its first trip in 1995, TCS has arranged more than 300 private expeditions, including many round-the-world trips; most are about three weeks long. My own, last October, was shorter ...

U.S. Defense Secretary Pete Hegseth's first trip since taking office will be to the United States' border with Mexico on Monday, in the latest sign that fortifying the border will be a priority for ...