The huge parachute used by NASA's Perseverance rover to land on Mars contained a secret message, thanks to a puzzle lover on the spacecraft team. Systems engineer Ian Clark used a binary code to spell out "Dare Mighty Things" in the orange and white strips of the 70-foot (21-meter) parachute. He also included the GPS coordinates for the mission's headquarters at the Jet Propulsion Laboratory in Pasadena, California. Clark, a crossword hobbyist, came up with the idea two years ago. Engineers wanted an unusual pattern in the nylon fabric to know how the parachute was oriented during descent. Turning it...