Suicidal behaviour is a disease, psychiatrists argue
Evidence from brain and genetic studies suggests we should regard suicidal behaviour as a disease in its own right, a move that may help prevent suicides
Six threatened and not-so-threatened ecosystems
Conservationists are launching a Red List of Ecosystems to assess the health of whole habitats. Here are six that have been studied so far
Stem cells: Back to the future
The unexpected return of therapeutic cloning could reopen ethical arguments that seemed to have been laid to rest
Rebuilding not rewinding is the future of conservation
The concept of "natural" makes little sense in our ever-changing, human-dominated world
Ice tsunamis overwhelm lakeside homes
It''s a rarely seen phenomenon - high winds have blown ice floes ashore in Canada and the US on two consecutive days, destroying homes
Pain ray: The US military''s new agony beam weapon
A weapon that fires a beam hundreds of metres to induce unbearable pain is ready to be unleashed on the world - what should be done with it? (full text available to subscribers)
China gains observer status on the Arctic Council
The Arctic Council has admitted five Asian nations – most notably China – plus Italy as observers. What does this mean for the Arctic''s future?
Google and NASA buy controversial quantum computer
New big-name clients for quantum-computer maker D-Wave may signal that their devices are going mainstream – but are they really that fast?
New memories filmed in action for first time
The processes of memory formation and retrieval have been observed across the entire brain for the first time using transparent zebrafish
Lifelogger reveals the day''s emotional highs and lows
A smartphone, a biosensor and a screen make up the Inside-Out system, which allows you to analyse how you felt throughout the day
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