The surprisingly simple recipe for starting to grow a limb

How do organisms form limbs in the womb? Scientists have been striving to answer this question not only to deepen our understanding of evolution and embryonic development, but also to help make the dream of regenerating partial ...

How dormant bacteria come back to life

Solving a riddle that has confounded biologists since bacterial spores—inert, sleeping bacteria— were first described more than 150 years ago, researchers at Harvard Medical School have discovered a new kind of cellular ...

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