BBC News

A pod of orcas make several close passes of a fishing boat off the coast of Orkney.

Tokamak Energy thinks its mini fusion generators will allow the company to test ideas faster than their competitors.

New research suggests that less dust means more dirty air in major Chinese population centres.

Tens of thousands of people marvel over shots of brightly lit Belgium taken from space.

A recent conference in Bahrain brought together experts in Islamic archaeology to discuss the lessons of the past and how to safeguard Muslim heritage for future generations.

President Trump will make "the right decision for the US" as he reviews the climate change policy.

A sheriff's helicopter crew warns paddle-boarders they are swimming with sharks off the California coast.

Two big cats including the African lion are most at risk from extinction due to loss of prey, say scientists.

Noam Chomsky argues the Republican Party is the most dangerous organisation in human history.

Campaigners say there should be greater scrutiny of industry bodies that are involved in UN climate talks.

Male Kentish glory moths are to be counted with the aid of bits of rubber coated in the scent of female moths.

The fossil of a hatchling dinosaur dubbed Baby Louie is recognised as a new species of feathered dinosaur.

Scientists release groundbreaking medical scans that reveal how the human brain develops.

Data collected from air quality monitoring stations shows high levels of pollution at the site.

An exotic grass planted as a biomass crop could be a valuable habitat for the brown hare, scientists say.

Yet more remains are presented of the extraordinary naledi people who appeared to cache their dead.

Delegates are wary of changing the Paris climate agreement just to keep the Americans on board.

After almost two years in orbit, the X-37B Orbit Test Vehicle has returned to Earth - but what has it been doing?

The creature's shell made a 8.5m-long mark as it drifted along the seafloor 150 million years ago.

What was the US Air Force's X-37B doing during its almost two years in orbit?

Land Speed Record holder Andy Green describes how the Bloodhound supersonic car will drive in a straight line.

Climate negotiators meet in Bonn amid concern that the US president could shun the Paris accord.

The French collection was incinerated by Australian biosecurity officers due to missing paperwork.

The minefields laid in the Falkland Islands 35 years ago have been a blessing for penguins, which are not big enough to trigger explosions. But now the time has come for their home to be demined.

Scientists in Germany have invented an indoor sun.

The satellite, funded by India, will help South Asian nations boost their communication services.

The scheme is part of the government's draft clean air plan, which critics dismissed as "toothless".

After a protracted legal battle, ministers are forced to reveal anti-pollution proposals.

Watch the moment a young ape is freed after two years locked away in a wooden cage in Indonesia.

A fossil found on Skye of the early mammal suggests it had a set of milk teeth, say palaeontologists.

Two coders will share a $55,000 prize for what a Nasa official calls the "ultimate 'geek' dream assignment.

Scientists are counting albatrosses on remote islands from satellite images.

Super-sharp images from a US satellite are keeping track of remote bird-breeding sites.

Pioneering work that extracts information from audio of gunshots could help solve criminal cases.

Amur tigers were nearly driven to extinction, but conservation work in Russia is helping them bouncing back slowly.

Lulu the killer whale had 20 times the expected level of banned chemicals known as PCBs in her system.

Researchers say noise could affect how whales, dolphins and seals find food and communicate.

Using the insecticide thiamethoxam in spring could reduce bee numbers later in the year, a study finds.

One of the UK's last killer whales, which was found dead last year, had some of the highest levels of a toxic pollutant ever recorded.

The fissure that will lead to the breakaway of one of the largest bergs ever seen has a new branch.

The UK Government has decided not to appeal against the High Court's rejection of a bid to delay publication of its draft plan to tackle illegal levels of air pollution.

Nasa says its Saturn probe encountered very few particles in its dive inside the rings last week.

A fossil kept in storage in a museum for decades turns out to that of a new species, say researchers.

A group in Ontario are using animals like capybaras and kinkajous to reduce stress.

Botanists unlock the genetic workings of the tea plant, in a move that could improve flavour.

Overseas territories' ministers say Brexit is distracting the government from environmental issues.

A SpaceX Falcon 9 has launched a classified military satellite - known only as NROL-76 - into orbit.

Changing rules on best before dates and the sale of "wonky vegetables" could help cut waste, MPs say.

The US president said he hoped the new order would create "thousands and thousands" of jobs.

The DNA of extinct humans can be retrieved from sediment in caves - even in the absences of skeletal remains.