BBC Science/Nature News
Beams collide in Big Bang machine - Engineers operating the Large Hadron Collider (LHC) have smashed together proton beams in the machine for the first time.
US 'will announce climate target' - The US will give a target for reducing greenhouse gas emissions at next month's UN climate summit, officials say.
Design fixed for 1,000mph car - The UK team aiming to smash its own land speed record by driving a car beyond 1,000mph settles on a final design for the vehicle.
East Antarctica 'is losing ice' - The massive and apparently stable East Antarctic ice sheet is losing mass, a new study suggests.
Cern Collider makes fast progress - Researchers working on the Large Hadron Collider are delighted with the progress made since the machine restarted.
Dirt 'can be good for children' - Children should be allowed to get dirty, according to scientists who say being too clean can impair the skin's ability to heal.
Ex-USSR cosmonaut Feoktistov dies - The USSR's first civilian cosmonaut, Konstantin Feoktistov, a crew member of the 1964 Voskhod spaceship, dies.
Fish 'at risk' in acidified ocean - Fish reared in water acidified by CO2 may become "fatally attracted" to the smell of their predators, say scientists.
Stunning flyby pictures of Saturn's enigmatic moon Enceladus - The Cassini mission completes a flyby of Saturn's moon Enceladus, sending back data and stunning images of the rippling terrain.
How monkey grandmothers take up the maternal role - Grandmother macaques care for their abandoned grandchildren, behaviour not recorded before in non-human primates.
Risky bridges - Why do only some bridges collapse in heavy floods?
Carbon credit - Are children's futures going up in smoke?
In pictures - Nepal's greater one-horned rhino makes a comeback
Earth Watch - Korean model for Obama as Copenhagen looms
In pictures - Rare creatures found in the depths of the ocean
Palaeo-celebrity - A journey to the Java home of an ancient alpha male
Climate: A question of justice - Why a human rights activist is making the jump to mainstream environmentalism.
From space race to human race - Why humanity needs a 'space race' for this planet
Giraffes use 'supercharged' heart - Giraffes use a small, supercharged heart to pump blood up their neck.
Seahorse 'hitchhikes' Atlantic - An American seahorse is found in European waters.
Water mission returns first data - A European satellite launched to study Earth's water cycle returns its first data, confirming its novel instrument works well.
Astronaut becomes father in orbit - Astronaut Randolph Bresnik becomes a father in space after his wife gives birth to a daughter back home on Earth in Texas.
New skin 'may help burns victims' - French researchers say they have found a way of using human embryonic stem cells to create new skin which could help serious burns victims.
First test for record solar plane - The prototype of a solar-powered plane destined for a record round-the-world journey makes its first trip across a runway.
Spacewalk for shuttle astronauts - Two astronauts from the space shuttle Atlantis have embarked on the first spacewalk of their mission.
UK climate unit's e-mails hacked - The e-mail system of one of the world's leading climate research units has been breached by hackers.
Mammoth dung clue to extinction - A study of mammoth dung is helping unravel the mystery of what caused the great mammals to die out.
Skate may be fished to extinction - A species of skate could become the first marine fish driven to extinction by commercial fishing, say scientists.
Energy-saving bulbs 'get dimmer' - Energy-efficient light bulbs lose on average more than a fifth of their brightness over their lifetime, a study finds.
Corps blamed for Katrina floods - A US judge rules that negligence by army engineers led to massive flooding in part of New Orleans as Hurricane Katrina struck in 2005.