Walking through the ancient Nabataean city of Petra can be a challenge. A tour begins with a 20-minute walk down a rocky slope through the narrow Siq to get to the famous Treasury known to Indiana Jones fans. But that is...

Find out about wind and jet streams and the tools that measure them.

In this interactive, find out how the Wright brothers' design of the first flyer provided lift and speed, and allowed the pilot to make adjustments in response to changes in wind speed and direction.