From a molecular perspective, Lucentis was designed to stay in the eye and have a short half-life (two hours), while Avastin was designed to enter the circulatory system and to stick around to fight off cancer (a half-life of 20 days).

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But cesium-134, which has a half-life of only two years, clearly came from the meltdowns, the researchers say.

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Withdrawal-type symptoms typically resolve in a week or two depending on the half-life of the specific benzodiazepine involved, which suggests that at a gross level, the brain returns to normal fairly quickly.

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Ana, Ramon and their children have lived this separated family life for two-and-a-half years.

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As is true for most of us who grew up in the latter half of the twentieth century, the first twenty-two years of my life seemed to revolve around an unending series of tests designed to rank me versus my peer group.

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Brooke was diagnosed with cerebral palsy aged two-and-a-half and has spent most of her life in a wheelchair.

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The Life Story of David Lloyd George - a two-and-a-half hour epic about the UK's leader during World War I - had been presumed lost after it disappeared in 1918.

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