New research of a Martian meteorite suggests that water - an essential ingredient for life - arose in hot springs on Mars 4.4 billion years ago, at the same time as it did on Earth.

But when that in turn fell to Muslim forces in the seventh century, Petra disappeared. In ruins after a series of earthquakes, it came to be known as Wadi Musa—the Valley of Moses. Avenue of ...

Since then, Petra’s fame has grown. UNESCO inscribed the city’s ruins as a World Heritage site in 1985, and the 1989 film Indiana Jones and the Last Crusade used Petra as a stage for some scenes.