What will North Korea's nuclear test reveal?
North Korea's expected atomic test will offer a rare chance to gauge where its nuclear programme is headed, with most expert attention focused on what type of device is detonated and how.
Canadians create 'most energy-efficient' bulb
A trio of Canadians claimed Wednesday to have invented the world's most energy-efficient bulb: a 12-watt LED light that shines as bright as a 100-watt incandescent one.
N. Korean nuclear test could be tricky to detect
North Korea has vowed to carry out a third nuclear test, but scientists and concerned foreign governments may have a tough time verifying the actions of the reclusive state.
'Tree of life' has Kurdish roots: study
Seen by some as emblematic of the Mediterranean landscape and cuisine, the olive tree in fact has its domesticated roots in Kurdish regions, said a study Wednesday that seeks to settle an age-old debate.
Scientists 'print' 3D object with stem cells
Scientists on Monday said that for the first time they had printed 3D objects using human embryonic stem cells, furthering the quest to fabricate transplantable organs.
NASA science balloon breaks longest flight record
After more than 55 days flying over Antarctica, NASA's huge Super-TIGER scientific balloon has broken the record for the longest flight of its kind, bringing back a wealth of data.
Skull found in Britain could be King Richard III's
British archaelogists hunting for the lost remains of King Richard III on Monday revealed the first image of a battle-scarred skull found at a car park ahead of what they said would be a "major announcement" about their findings.
Shackleton Antarctic bid makes landfall
An exhausted British-Australian expedition recreating Ernest Shackleton's 1916 crossing of the Southern Ocean in a small boat made landfall Monday after a perilous 12-day journey.
US scientists explain how owl rotates head
US medical specialists from Johns Hopkins University in Baltimore have figured out how owls can almost fully rotate their heads - by as much as 270 degrees in either direction.