Medical research

Manufacturing spermatogonia stem cells

For species that rely on sexual reproduction, including mice and men, offspring can only happen if sperm from the male fertilize eggs from the female. Even artificial fertilization techniques depend on donors for both of ...

Neuroscience

How does the brain process fear?

When a frightful creature startles you, your brain may activate its fear-processing circuitry, sending your heart racing to help you escape the threat. It's also the job of the brain's fear-processing circuits to help you ...

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