The latest stories from the Science & Environment section of the BBC News web site.
Updated: 2 hours 10 min ago
How one of Africa's biggest solar farms could help South Africa solve its energy crisis.
Physicists studying the motion of sperm discover that the little swimmers flock together in tight groups if the surrounding fluid is "viscoelastic".
Most of us share 2-4% of DNA with Neanderthals; some have genes from Denisovans; but their genetic mark has vanished in some stretches of genetic code.
Ben Nevis, Britain's tallest mountain, is re-measured by Ordnance Survey and is now officially put at 1,345m high - a metre taller than before.
US theme park operator SeaWorld says it is ending its controversial orca breeding programme, after facing criticism over alleged poor treatment of its captive orcas.
Astronomers use the Hubble Space Telescope to investigate a clutch of monster stars on the edge of our Milky Way Galaxy.
A meteor has been sighted above Britain in the early hours with witnesses describing seeing a green flash.
A dog owner says her pet is "lucky to be alive" after contracting a deadly tick-borne disease that is expected to spread around the UK.
A search for pharaonic Queen Nefertiti's resting place finds possible "organic material" inside spaces behind walls in Tutankhamun's tomb, Egypt says.
Physicists say a supercomputer simulation of blood flow around the entire human body is showing promise, based on an experimental test.
The public are being asked to name the UK's new polar research ship, which will begin operations in 2019.
What would it take to put an astronaut on Mars?
Scientists say a strange worm-like fossil with mysterious origins is actually the ancestor of living fish.
The Chancellor was accused by greens of promising a Budget for the next generation whilst doing too little to combat climate change.
Who was subject of latest Google Doodle?
A new selection of stretchy but switchable 'metamaterials' is created based on intricate, repeating motifs found in Islamic art.
The world's most unlikely pigeon smuggling route
Dog owners are being warned about an outbreak of a lethal tick-borne disease.
The oldest genome sequence from a human has identified some early representatives of the Neanderthal lineage.
Scientists unveil the first full description of how and why a ribbon curls when we scrape one side of it with scissors.