Laughter really is the best medicine. Neuroscientist James Olds (George Mason University) says laughter stimulates the immune system, which helps the body ward off disease, and it is just as essential for our mental health.

Also featured: “Frankenfood” or manna from heaven? Biologist Camellia Okpodu (Norfolk State University) thoughtfully evaluates the many benefits and the potential dangers of genetically modified plants.

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