The four Crew-12 astronauts will bring the International Space Station’s staff back to seven after a month of operating with three people on board.
Surprised astronomers said Thursday they have discovered a star with planets in a bizarre order that defies scientific expectations – and suggests these faraway worlds formed in a manner never seen before.
The Y chromosome doesn’t seem to do much except determine sex – but its loss in older men might be linked to heart disease, cancer and Alzheimer’s.
The collision could also be responsible for Saturn’s iconic rings, researchers say.
