A tiny fish is helping scientists understand how the anesthetic drug ketamine relieves depression. NPR's Jon Hamilton reports on research showing how ketamine altered the brain of a zebrafish. JON ...
A heart attack will leave a permanent scar on a human heart, yet other animals, including some fish and amphibians, can clear cardiac scar tissue and regrow damaged muscle as adults. Scientists have ...
Zebrafish experience what's known as "emotional contagion" and react when their peers are afraid. Oregon State University via Flickr under CC BY-SA 2.0 Fish may have their own version of empathy. Like ...
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