Sea lice carried by farmed salmon are not responsible for a sharp decline in the wild population of a species of Pacific salmon, a report suggests.

The most distant spacecraft from Earth, Voyager 1, returns new data suggesting it is very close to leaving the Solar System.

African elephants that invade farmers' crops have higher levels of stress hormones, say scientists, showing they perhaps anticipate the risks of the raid.

The state-owned Forensic Science Service, which employs 1,600 people and provides services to police in England and Wales, is to be wound up.

Bright city lights exacerbate air pollution, according to a study by US scientists.

Viewing conditions for the Geminid meteor shower are expected to be excellent in several locations around the UK.

Life may have survived a cataclysmic global freeze some 700 million years ago in pockets of open ocean, say researchers.