BBC

Chemicals banned in the 1970s have been found in the deepest reaches of the ocean, according to a new study.

More than 200 whales stranded on a remote beach in New Zealand on Saturday have refloated themselves and returned to sea.

Chemical spraying began in Santa Cruz department, the eastern grain region of the country.

The mass stranding of whales on a remote beach in New Zealand has taken a turn for the worse as 240 more arrived.

A frustrating development for rescuers only hours after 100 were successfully refloated.

A quarter of Europe's cricket and grasshopper species are being driven to extinction, say experts.

Professor Sir Peter Mansfield, who left school at 15 and won the Nobel prize, dies aged 83.

He's only 19cm (7.4 in) tall and has been named Thanos.

Dogs mirror the personalities of their human companions, according to research.

Plans to launch satellites - and even people - from the UK get a boost from government.

The decision comes after Donald Trump formally backed the pipeline in an early act as president.

The way orangutans communicate could shed light on humans' first words.

Fumigation must start immediately to avoid further destruction on the main agricultural area.

Scientists say that decoding the quinoa genome could cut the cost of this nutritious but underutilised crop.

A facial reconstruction has been made of Orkney's St Magnus by a forensic artist to help mark the 900th anniversary of his death.

Scientists say the collapse next to the Great Barrier Reef dates back more than 300,000 years.

Hans Rosling, who has died in Sweden aged 68, tells 200 years of world history in four minutes.

Disease has killed up to a quarter of Critically Endangered Saiga antelope in Mongolia, scientists say.

Mr Rosling was known for lively, data-driven presentations debunking myths about global development.

A herd of plains bison have been successfully reintroduced to Canada's oldest national park, more than 100 years after they were nearly hunted out of existence.