Atoms merge in the world’s ‘smallest bubble’ of water. A study has captured unprecedented images of hydrogen and oxygen atoms combining to form a miniature water droplet from air, which could help astronauts produce water in space.
Nabta Playa: A mysterious stone circle that may be the world's oldest astronomical observatory
'It was 3 hours of magic': Spectacular auroras thrill stargazers across the world (and internet) as intense geomagnetic storm batters Earth (photos)