Metals play key roles in human health, from ensuring healthy bones to helping make red blood cells.
Neuroscientist Chiara Cirelli at the University of Wisconsin-Madison and others believe that a good night's sleep helps us learn more the next day.
National Institutes of General Medical Sciences' imaging programs are peering into the lives of cells.
Anesthetics have been used in many procedures for more than 150 years, doctors and scientists still don't know exactly how these medicines work in the body.
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