Image of the Day: Fixing a Broken Ticker

A heart with a hole in it is repaired using a patch from a cow's pericardium, the membrane that encloses the muscular organ.

By The Scientist Staff | February 14, 2013

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By Dan Cossins

Scientists find the molecule that delivers itchiness signals to the brain via a dedicated, and previously unknown, neural pathway.

By Jef Akst

The International Institute for Species Exploration at Arizona State University reveals its list of the top 10 new species of 2012.

By Kate Yandell

The virus is able to transmit between the small mammals, but does not appear to spread readily through human-to-human contact.

The Scientist