Restoring fertility | Identify ing bacteria | Time brain cells

Preserving sperm stem cells restores fertility in mice

Scientists stored stem cells that produce sperm for months and used them to restore fertility in male mice. The approach could potentially help young boys undergoing chemotherapy.

Method identifies disease-causing bacteria

A sensitive test accurately screened blood samples for the presence of any of the more than 300 bacteria known to cause disease in people.

How the brain keeps track of time

Researchers discovered a set of brain cells that keeps track of time in mice. The study suggests that there are separate brain circuits for recording information about time and places.

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