The latest stories from the Science & Environment section of the BBC News web site.
A visualisation showing where sizeable asteroids have hit the Earth in recent years has been released by the B612 Foundation.
The mystery of a bizarre quacking sound often heard in the Southern Ocean has finally been solved, scientists report.
Scientists have outlined how they managed to make the wonder material graphene using a kitchen blender.
For the first time in its history, the Environment Agency assesses the state of all flood defences in England following 'unprecedented' winter storms.
A leading British naturalist accuses Malta of failing to prevent large-scale illegal shooting of migratory birds by hunters.
US company SpaceX launches its latest re-supply mission to the International Space Station, sending up a Dragon freighter to rendezvous with the orbiting platform on Sunday.
Female insects with 'penises' have been discovered in Brazil - the first example of an animal with sex-reversed genitalia.
The US state department gives federal agencies more time to review the Keystone XL oil pipeline before determining whether to issue a permit.
A planet that is close in size to the Earth and that could hold water on its surface has been identified by the Kepler telescope.
A British project to capture CO2 and bury it under the North Sea looks set to receive a 300m-euro boost from the EU.
Scientists say they have discovered what could be the birth of a new moon in the rings of Saturn.
The first images come back from the radar satellite launched as part of the European Union's new flagship Earth-observation project.
Artists' brains are structurally different to non-artists in areas relating to fine motor movements and visual imagery, a study finds.
Hitachi says it will install a lift capable of reaching speeds of 72km/h (45mph) into a skyscraper in Guangzhou, southern China.
Ancient grasses from the Pampas of Argentina were preserved in glass when asteroids struck the area, scientists report.
Scientists use impact craters to work out the characteristics of the air on Mars 3.6 billion years ago.
Skywatchers in the Americas have caught a rare celestial show caused by the Earth's shadow falling across the Moon.
A new treatment for hepatitis C cured 90% of patients with the infection in 12 weeks, say scientists after studies in Europe and the US.
The US defence department is working on how to use old drones to provide wi-fi in remote locations, such as on the battlefield.
The competition to manufacture the next generation of Europe's most important series of weather satellites is won by Airbus Defence and Space.
Four women have had new vaginas grown in the laboratory and implanted by doctors in the US.
Birds learn to choose the the best building materials for their nests, rather than building from instinct, say scientists.
The European Parliament has approved new legislation to stem the spread of invasive species such as "killer" shrimp or Japanese knotweed.
The combination of fire and extreme weather events could accelerate tree mortality in the Amazon, a study suggests.
Air pollution in China and other Asian countries is having far-reaching impacts on weather patterns across the Northern Hemisphere, a study suggests.