The latest stories from the Science & Environment section of the BBC News web site.
Updated: 15 min 40 sec ago
New measurements by Nasa's Cassini probe suggest Saturn's moon Enceladus hides a mass of liquid water as big as Lake Superior under its icy surface.
Monique Pool is used to rescuing and rehabilitating sloths at her home in Paramaribo, Suriname - but even she was left struggling when 200 arrived at once.
The Met Office expect changing weather to begin to move the high levels of air pollution affecting parts of the UK in the next 24 hours.
One of the UK's top doctors says there is an accumulating body of evidence that highlights a link between urban green space and benefits to human wellbeing.
Why do zebras have stripes? Scientists at the University of California reveal the answer.
The government has said it will not expand badger culling to other areas this year to reduce TB in cattle.
Andrew Grieve, who is the senior air quality analyst at King's College, London, talks to Carol Kirkwood about pollution levels in the city.
Scientists digitally reconstruct the scene of a dinosaur 110 million year-old dinosaur chase.
The European Union begins the roll-out on Thursday of the biggest Earth-observation programme ever conceived - with the launch of the Sentinel-1a radar satellite from French Guiana.
Scientists digitally reconstruct the scene of a dinosaur chase - preserved in the mud of an ancient river bed in Texas.
Scottish gamekeepers begin their biggest ever conservation project aimed at halting the decline of the nation's vulnerable wading birds.
Air pollution has reached "high levels" in parts of Greater London, rural south-east England, and towns and cities in East Anglia, Defra confirms.
England's only resident golden eagle is looking for a new mate - 10 years after his last one disappeared.
Members of a group are more likely to lie after they inhale the "love hormone" oxytocin, a study finds.
Health warnings are issued by the government as pollution spreading across England is forecast to hit high levels.
New satellite fleet to keep a constant watch on Earth.
Five low-tech ways to cope with air pollution
A humanoid fire-fighting robot is to be tested by the US Navy as the latest move towards a more robotic military.
A vulture that went missing from a bird of prey centre in central Scotland is found 100 miles away on the island of Islay.
Chile declares three northern regions hit by a 8.2 magnitude earthquake to be disaster areas, with at least five people left dead.