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His death is being treated as unexplained but not suspicious.
BBC: Timothy Brockhurst
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Police are treating his death as unexplained, but not suspicious.
FORBES: News International Whisleblower Found Dead
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But astronomical observations have revealed unexplained outflows of matter from the vicinity of black holes.
CNN: Black holes in a new light
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It said there had been an "objective and detailed" re-investigation but the death was still being treated as unexplained.
BBC: Joanne Foreman death: Family speak of fight for justice
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Norfolk Police said there had been an "objective and detailed" re-investigation but the death was still being treated as unexplained.
BBC: Joanne Foreman family wins right to new inquest bid
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The longtime head of the Pemex union, who had been expected by many to fight any changes but has been the subject of questions about unexplained family wealth, pledged his support.
NPR: Mexico's President Gathers Power, Pushes Reform
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But the influence of cosmic rays could resolve other as yet unexplained cycles in tree growth found in studies in North America.
BBC: Earth News - Cosmic pattern to UK tree growth
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The death of his 48-year-old wife remains unexplained pending further tests, police said Friday, but the heiress's previous problems with drugs are well documented.
CNN: Billionaire's son in court over death of wife, Eva Rausing
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Elias Muhanna, a professor at Brown University in the US and editor of the Qifa Nabki blog on Lebanese politics, said the allegations were a "strange, unexplained aspect" of Mr Hassan's past, but had not dented his standing in the Sunni community.
BBC: Wissam al-Hassan, 2007
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They said unexplained fatigue was a common problem in doctors' surgeries, but it was as yet unknown whether iron supplements could help these women.
BBC: Iron pills may help women beat fatigue
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Ms Martin was taken through the injuries Millie had suffered before her death, but said that, apart from seeing her daughter hit her ear on a chair, her other bruises were "unexplained".
BBC: Millie Martin trial: Mother sobs during court questioning