Killer whales migrate, study finds, but why?

Some killer whales, a study published Wednesday shows for the first time, wander nearly 10,000 kilometres (6,200 miles) from Antarctica's Southern Ocean into tropical waters -- but not to feed or breed.

Does it help conservation to put a price on nature?

Putting a price on the services which a particular ecosystem provides may encourage the adoption of greener policies, but it may come at the price of biodiversity conservation. Writing today in the journal Science, Professor ...

Spain wilts in driest winter for 70 years

February is barely past but already Spanish farmers are on drought alert as reservoirs shrink, crops wilt and brush fires crackle after the country's driest winter in 70 years.

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