NASA's Mars Ingenuity helicopter missed its fourth scheduled flight on Thursday, with the space agency blaming a software glitch and vowing to try again the next day. "The helicopter is safe and in good health," said a statement, adding the rotorcraft had failed to transition to "flight mode." The team plans to attempt the flight once more on Friday at 8.16 pm IST (10:46 am Eastern Time) with data expected back at NASA's Jet Propulsion Laboratory around three hours later. The software issue is thought to be the same one that delayed Ingenuity's maiden voyage, the first powered flight on another planet. Initially scheduled for 11 April, the historic feat occurred on 19 April. The reason was a glitch associated with the aircraft's "watchdog timer," which alerts Ingenuity to potential problems and pauses its processes if it thinks it has detected an error. Engineers made a coding tweak that allowed Ingenuity to overcome the problem and trans...