Even after the completion of the fifth mission using this secretive spaceplane, the exact mission which is being carried out by X-37B still remains unclear
Even though Elon Musk's SpaceX is busy formulating plans to take humans to Mars, critics believe that these missions could never get materialized due to various reasons
A few months back, it has been reported that a mysterious source located in China is sending greenhouse gases to the atmosphere, thus causing depletion of the ozone layer