DARPA’s ANCILLARY program aims to develop a vertical takeoff and landing (VTOL) aircraft that can operate in areas without preexisting air bases or other infrastructure.
Earth’s highest, coldest, rarest clouds are back. How to see the eerie ‘noctilucent clouds’ this summer.
Look North as the stars appear in June and July to have a chance of seeing rare noctilucent (or ‘night-shining’) clouds with the naked eye.