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12 Feb 2009: The research, published today in the British Medical Journal, highlighted a 44% increase in risk of cognitive impairment when exposed to high levels of

1 Aug 2009: Traditional incandescent light bulbs are only 5% efficient at converting the electricity they consume into light, and, although low-energy light bulbs are 20% efficient, they contain hazardous mercury.

20 May 2009: Share. Published. 20 May 2009. Search news. Sign up to receive our newsletter.

27 May 2009: Over the past decade, Dr Peter Smielewski and Dr Marek Czosnyka in the Neurosurgery Unit of the Department of Clinical Neurosciences have been developing

1 May 2009: Peter Sell has worked in the Herbarium for over 60 years and, in collaboration with Gina Murrell, has for 20 years been compiling the taxonomy, ecology and distribution of every species

24 Nov 2009: The study casts doubt on the Efficient Market Hypothesis, which has over the past 20 years encouraged a laissez-faire attitude to the financial markets.

2 Nov 2009: Friday 20 November provides a full day of Masterclasses where Silicon Valley iconic entrepreneurs and investors will share their experience in an inspiring series of seminars.

29 Jun 2009: Professor Andrew Balmford. The research, published today in the journal PLoS Biology, found that in 15 of the 20 countries for which information was available there was an increase in the ... Their findings show that since the 1990s, while visitor

19 Jan 2009: The exhibition runs from 20 January to 20 June 2009 (closed 10-13 April inclusive) and admission is free.

22 May 2009: Brenda King oversees an initiative that, at any one time, mentors around 120 pupils from African-Caribbean backgrounds. All come from state schools, most in