A hormone called FGF21 can reverse obesity in mice by activating a newly identified brain circuit tied to metabolism. Surprisingly, it works in the hindbrain—the same region targeted by GLP-1 drugs ...

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The formation of a part of the human brain responsible for regulating vital functions is triggered in an identical way in the sea lamprey, a new study has found. The discovery suggests that we’re ...

The sea lamprey, a 500-million-year-old animal with a sharp-toothed suction cup for a mouth, is the thing of nightmares. A new study discovered that the hindbrain -- the part of the brain controlling ...

A zebrafish swims toward its intended target, but strong currents push it off course. Nevertheless, the tiny fish swims back to its original location, determined to finish its journey. How do animals ...