Scientists crack 'impossible' galactic mystery as clearest-ever images of black hole edge revealed
Astronomers had long lacked the technology to solve the riddle - until now
Austrian cow makes history as tool use recorded for first time ever
Veronika, a 13-year-old bovine, remarkably uses brushes to scratch itches she would otherwise be unable to reach
Dinosaur discovery by palaeontologists fundamentally alters scientific understanding of the T. rex
The findings challenge decades of assumptions about dinosaur biology
