In a rare sight, marine biologists spot 60 enigmatic Arnoux's beaked whales gathering off the Antarctic coast. Full story...
A hammerhead shark's unusual shape gives it outstanding vision, according to a study which may solve a centuries-old mystery.
Commonwealth leaders meet in Trinidad, with climate change high on the agenda in the last major summit before Copenhagen.
The crew of the space shuttle Atlantis prepare to land in Florida after their 11-day mission to the International Space Station.
The chirps and whistles of birdsong can help to provide an accurate estimate of the size of bird populations.
US scientists are testing a radical new theory that MS is caused by blockages in the veins that drain the brain.
Brazil hosts a regional summit on how to save the Amazon basin from continuing deforestation and climate change.
Unusually warm and cold spells in climate history are linked to how oceans responded to temperature changes, a study says.
China unveils its first firm target for limiting greenhouse gas emissions, two weeks before the Copenhagen climate summit.
Researchers have demonstrated a device that can kill off superbugs such as MRSA in just seconds - and could help with body odour.
The government needs to update its guidance on the impact of noise from wind turbines, a campaign group says.
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