NASA’s InSight Mars lander has discovered little evidence of underground water at its site, but scientists are urging more research before drawing firm conclusions.
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.