The latest stories from the Science & Environment section of the BBC News web site.
Actualizado: hace 1 hora 13 mins
An asteroid called TB145 will pass within a few hundred thousand kilometres of the earth.
A new design for lithium-air batteries overcomes several hurdles that have stood in the way of this "next-generation" concept.
Marine wildlife experts believe dolphins attacked a young pilot whale which was found stranded on a beach in Skye.
The UN says the current climate plans from 146 countries represent a significant advance - but will not be enough to prevent dangerous warming.
BBC Click's LJ Rich looks at some of the best of the week's technology news.
Puffins and turtle doves are among four UK bird species now at risk of extinction, according to the latest revision of a global conservation database.
Senior Buddhists have called on world leaders to agree a new climate change agreement at a conference in Paris next month.
The Rosetta spacecraft discovers molecular oxygen in the cloud of gas surrounding Comet 67P prompting a rethink on the origins of the Solar System.
Venus, Jupiter and Mars can be seen from the Earth's skyline this week in a rare grouping of the three planets.
Authors of a study on lion populations believe many are in rapid decline and the animal should now be classified as endangered in parts of Africa.
How a couple in Taiwan has built a farm solely from recycled materials including wood, glass and newspapers.
How do you stop the horn trade?
The Cassini spacecraft has made a final ultra-close flyby of Enceladus, a moon of Saturn, to "taste" the water it is spewing into space.
Engineers in Bristol develop a system that holds and moves small objects without touching them, using "holograms" built from sound waves.
Six pairs of giant panda twins, born in China's Sichuan province, make their public debut.
A case of anthrax in a cow is confirmed on a farm in Wiltshire, Public Health England confirms.
Mars, Jupiter and Venus will be seen together in the sky this week, in a rare grouping of the three planets.
The UK's most popular dog breed can suffer from weight gain in middle age just like people, a canine health survey by Edinburgh scientists finds.
About 1,000 Bikini islanders are hoping to relocate to the United States as rising seas threaten their adopted home.
The great British tradition of conker fighting is under threat because of an infection which is being spread through the country by a moth - which eats horse-chestnut trees.