When I say jump, your iPhone can tell you how high.

That’s a line from the WWII movie, with Gregory Peck talking to the crew of his B-17 bomber on a mission over Germany. The B-17 was a four-engine bomber that required the crew to wear oxygen masks at ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Temperature is not corrected to sea level ...