BBC

A beach in Siberia has been transformed by naturally occurring giant snowballs.

Planet Earth II's camera crew came back from filming to find an unwanted visitor.

The Canadian military probes a mysterious Arctic pinging sound, officials tell the BBC.

An earthworm named Dave wriggles into the record books as the largest ever found in the UK - measuring a whopping 40cm (15.7in).

Researchers apply for a licence to carry out a trial of a genetically modified wheat crop in a small field in Hertfordshire.

The Paris agreement on climate change has come into force, with efforts due to continue next week on the way ahead.

Inventor Sir James Dyson is setting up his own technology institute to tackle the shortage of engineers.

Given the complexity of antibiotics resistance, what should we do to tackle the problem?

A rare species of frog is discovered which startles predators by revealing its bright orange groin.

Ebola dramatically adapted to infect human tissues with ease in the first few months of the Ebola outbreak.

Authorities in Florida are releasing sterile flies in a bid to stamp out a flesh-eating livestock disease that has returned to the US for the first time in 30 years.

China has launched its biggest rocket to date - the Long March 5.

An analysis of national plans to cut carbon says they are still way above the levels needed to keep the rise in global temperatures under 2C.

Engineers finish assembling the telescope that will succeed Hubble. James Webb, as it is known, is now on track to be launched two years from now.

Thousands of school children have been helping to carry out experiments to see whether seeds that have been in space grow as well as those that have stayed on Earth.

The swiftness with which the first Aboriginal settlers spread across Australia is underlined by the discovery of an ancient rock shelter north of Adelaide.

New research suggests chipmunks and a type of mouse evolved stripes early in their evolution, which may have given them an advantage in outwitting predators.

The results of a mass schools experiment led by Tim Peake have been released.

Campaigners have won the latest battle in legal action against the UK Government over levels of air pollution.

A newborn rhino, born at Blank Park Zoo in the US city of Des Moines, has been taking her first bath.