Ian Sample

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  Bacteria from slim people could help treat obesity, study finds

  5 Sep 2013: Experiments show microbes from thin or fat people's intestines can cause mice to lose or gain weight

• Syrian chemical weapons: how lab tests uncover evidence of sarin gas

  5 Sep 2013: Scientists will have been looking for traces of nerve gas's breakdown products – but finding proof is rarely straightfoward

• UK report on chemical attack in Syria adds nothing to informed speculation

  29 Aug 2013: A striking lack of scientific evidence leads the Joint Intelligence Committee to fall back on well-worn assertions

• Syria deaths: powerful asphyxiant in strike was probably sarin, say experts

  22 Aug 2013:

  Specialists say symptoms observed in footage of victims offer strong evidence that nerve agent was used near Damascus

• Syria conflict: chemical weapons blamed as hundreds reported killed

  22 Aug 2013:

  Death toll claimed to be as high as 1,400 as Syrian government admits launching offensive but denies using chemical weapons

• Chemical weapons experts say strike near Damascus fits with lethal toxin use

  21 Aug 2013: Analysts say videos of attacked rebel-held areas show asphyxiations and emergency staff overwhelmed with victims

• New H7N7 bird flu strain discovered that could pose threat to humans

  21 Aug 2013: H7N7 virus, found in chickens at markets in China, can kill ferrets, which are used as proxies for people in flu research

• 'Teddy bear' carnivore emerges from the mists of Ecuador

  15 Aug 2013:

  Olinguito is first new carnivore identified in western hemisphere for 35 years, bringing 100 years of mistaken identity to an end

• Genetic map of cancer reveals trails of mutation that lead to disease

  14 Aug 2013:

  Map shows how 20 patterns of mutation drive 30 cancer types, pointing the way to prevention and treatment strategies

• Neanderthals may have invented a tool that is still in use today

  12 Aug 2013:

  Bone tool called 'lissoir' made by Neanderthals is similar to instruments still used by modern leather workers

• Dog-tired: hounds keep best yawns for human pals not strangers

  7 Aug 2013:

  Tokyo University scientists dig for roots of evolved canine empathy in contagious yawning study with (one's) best friend

• Jurassic squirrel's secret is out after 165m years

  7 Aug 2013: Discovery of furry animal with sharp teeth and poisonous spur provides more clues to the evolution of mammals

• Plans to make H7N9 bird flu virus more virulent in high-security tests

  7 Aug 2013:

  Scientists say genetically modifying the H7N9 virus in the lab will help drive efforts to develop pandemic drugs and vaccines

• Christmas lectures will address ethical challenges posed by genetics

  5 Aug 2013:

  Biologist Alison Woollard will tackle issues such as genetic modification of humans in Royal Institution Christmas Lectures

• UN team heads to Syria to inspect sites of alleged chemical weapon attacks

  1 Aug 2013: Team to depart 'within days', ending months of negotiations after attack near Aleppo sparked blame game between Assad regime and rebels

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