According to Dr Sinclair's theory, which he calls xenohormesis, animals rely on such botanical stress signals to give them extra information about their own environments, in the same way that the alarm calls of one species warn others of danger.

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President Bush has been right to warn of the danger posed by stocks of chemical and biological weapons in Saddam Hussein's hands.

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Critics warn of the danger of so many young people having their formative experiences of alcohol without the supervision of bar staff and bouncers.

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The article quoted Father Yorio as saying the future pope "didn't warn us of the danger" and ostracized the two due to their work in slums, seen as hotbeds of subversion.

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Will these elected officials and party elders now warn their party about the danger of taking Bachmann's lead on messaging in this new line of attack against Obama?

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Yet, that is, nonetheless, the professional judgment of over 1160 retired senior military officers who joined together earlier this year to warn President Obama and the Congress of this danger.

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And when I spoke, I did warn him, the Vice President, of the danger of things getting off track.

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Twitter is emphasising that it acted rapidly to warn people the moment that it spotted the danger - but there is still little information about the nature of the attack or why just one small section of users is in danger.

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One of the officials said Obama challenged his economic team to "think bolder" as some economists warn there is danger in the government doing too little to curb the recession.

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