The top-secret X-37B space plane is about to break another record
The U.S. Air Force’s top-secret autonomous space plane, the X-37B, is days away from breaking its own longevity record. The aircraft, which looks like a mini Space Shuttle, will on March 25 begin its record-setting 675th day in orbit, but we still don’t know much about what it’s doing up there. The X-37B looks a…