Albert Einstein’s “happiest thought” has been proven again by astronauts and a doll made in his likeness. The crew on Dragon “Endurance” revealed their zero-g indicator, a plush of the physicist.
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.