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Tag: "ray" at biology news

New tooth enamel dating technique could help identify disaster victims

...4, or radiocarbon, is naturally produced by cosmic ray interactions with air and is present at low levels in the atmosphere and food. Atmospheric testing of nuclear weapons from 1955 to1963 produced a dramatic surge in the amount of radiocarbon in the atmosphere, Buchholz said. "Even though the detonati...

Science's Breakthrough of the Year: Watching evolution in action

... December 2004, may be the result of a short gamma ray burst -- a rapid merger of two ancient neutron stars or a neutron star and a black hole. Brain Wiring and Disease: Several studies in 2005 suggest that diseases such schizophrenia, Tourette syndrome, and dyslexia are rooted in "faulty wiring" of th...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

...out eight percent per year, the east coast cownose ray population may now number as many as 40 million. T... through, he found that most scallops survived the ray predation, allowing the scallop population to support a fishery and still replenish itself each year...

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