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A senior figure in the Ukrainian defence industry told New Scientist that a test took place two years ago involving fully autonomous drones set to destroy anything in a given area, with confirmed casualties

Europe's largest land animal, the bison, is thought to be relatively unthreatened by predators, but footage from Białowieża Primaeval Forest in Poland shows it does face attacks from wolves

Researchers diving 7 kilometres deep in a crewed submersible have discovered a vast collection of whale bones, including fossils up to 5 million years old and species new to science

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming into view, revealing hints of a surprising past – and the origin of Saturn's rings

Climate models suggest a small nuclear war in the tropics would do even more damage to the ozone layer than a larger nuclear war in more northerly latitudes, increasing exposure to dangerous ultraviolet radiation all over the world