BBC News

Millions of pieces of human-made trash are orbiting the Earth. Some are tiny, but all pose a risk.

Scientists capture a dramatic collision between two young stars that tore apart their stellar nursery.

Everything you know about memory may be wrong.

Could edible caterpillars help fight malnutrition and food security problems in West Africa?

Astronomers make the first detection of an atmosphere surrounding a "super-Earth" planet.

UN celebrates fall in renewables costs but warns that investment is slipping.

Amazon's founder and CEO Jeff Bezos is investing $1bn (£801m) a year to fund his Blue Origin company.

Rare furnishings in England's historic houses are under threat from a new species of the insect.

Scientists in the US find traces of the most widely used insecticides in tap water for the first time.

Artist Stephen Turner lived on the egg from July 2013 until July 2014.

Researchers estimate that there are 60,065 species of trees in the world.

The BBC's Pallab Ghosh has been finding out about a filter made from graphene that can turn salt water into drinking water.

Scientists have established how Britain physically split from the rest of Europe 450,000 years ago.

Study found piglets have "innate preference" for sweet flavours.

Cognitive scientist Daniel Dennett believes the human brain might not be that special.

The pink, scaleless cave loach was found by divers in an underground cavern in southern Germany.

The predators use elaborate techniques to prepare octopuses for consumption, researchers say.

A new plan to tackle pollution in London

Fears are raised TB could be linked to growing numbers of red deer running wild in parts of rural Wales.

The development could help provide clean drinking water for millions of people who lack access to safe sources.

The launch of the giant outdoor experiment will see trees engulfed by high levels of carbon dioxide.

Aquariums are quitting a Japanese zoo body to avoid a ban on a controversial method of catching dolphins.

Scientists dose trees with atmosphere of the future to see how much they can swallow.

Scientists are learning even if you ignore politics, politics won't ignore you.

A leading biologist says Scotland's native honey bees are being threatened by imports brought in because of the hobby's growing popularity.

The gas argon tells scientists that the atmosphere at Mars was once as thick as it is on Earth today.

Research reveals the toxic secret behind the fang blenny's pain-free bite.

A film of Bubba the "football playing" tortoise has clocked up millions of views after it was posted online.

Its stripes are more like a bumblebee's.

Scientists say their discovery shows there are medical secrets still hidden in our oceans.

China begins closing down its legal ivory trade, but will consumer attitudes to prized artwork change?

SpaceX flies and lands a Falcon 9 rocket that had already been used on a previous mission.

Astronauts Peggy Whitson and Shane Kimbrough were meant to be installing debris shields on the ISS.

California's SpaceX company expects to make a piece of history later when it re-flies a Falcon rocket.

The spectacular James Webb Space Telescope is bound next for the giant Apollo testing chamber.

Research will be carried out into the age and rarity of the tusk.

The global food trade is depleting water sources quicker than they can naturally be refilled in many places.

The Australian state of Queensland is assessing the extent of the damage caused by the major storm.

Eleven Asian elephants manage to drag themselves clear of a muddy hole in Cambodia.

Camera traps caught images of the critically endangered Indochinese tigers in eastern Thailand.

Scientists have made a mini working replica of the female reproductive tract to experiment on.

Europe is going to investigate a second site on Mars - called Mawrth Vallis - as a possible destination to send its 2021 rover.

Environmentalists warn Mr Trump's order will have serious consequences at home and abroad.

A senior researcher claims ministers are using a flawed method for assessing badger numbers in the TB cull.

The origins of house mice go back about 15,000 years to the Middle East, fossil evidence suggests.

Scientists describe a remarkable collection of dinosaur tracks on beaches in Western Australia.

An Australian university has asked amateur stargazers to help find a possible ninth planet.

After years of protest, the University of Melbourne has removed the name of a controversial figure.

The scale of "fake research" in the UK appears to have been underestimated, a BBC investigation suggests.

Scientists locate the source of powerful tsunamis that swept across Mars three billion years ago.