Ancient fish illuminates one of the mysteries of childhood

Remember dropping your milk teeth? After a lot of wiggling the tooth finally dropped out. But in your hand was only the enamel-covered crown: the entire root of the tooth had somehow disappeared. In a paper published in Nature, ...

Fishing for answers on bone loss in space

During spaceflight, astronauts lose bone mineral density, but it is not clear exactly what causes this loss. Scientists trying to understand why recently went fishing for answers. They reared small freshwater fish aboard ...

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