Extinction risk 'underestimated'

'Viking mouse' invasion tracked
Scientists say that studying the genes of mice will reveal new information about patterns of human migration.

Beaked whales - into the abyss
Scientists believe that beaked whales are one of the least understood groups of mammals on Earth.

Ownership key to saving fisheries
Giving fishermen long-term rights to fisheries keeps stocks healthy, scientists conclude from a huge global survey.

X-ray pulse seen in biggest holes
Scientists find what they say is a missing link between the behaviour of the smallest and biggest black holes

No 2008 record for Arctic sea ice
Sea ice in the Arctic appears to have passed its minimum extent, scientists say, without breaking last year's record.