The brain is only the size of a pea, but looks like a normal brain and has multiple cell types and all the regions of a normal brain - "equal in maturity to that of a five-week-old fetus," according to the report.

They say it could be used as a more effective and more ethical way to test the effects of drug treatments on the brain.

Click here to read more from AFP.

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Collect candy, play carnival games for prizes and do more not-so-scary stuff at Boo at the Zoo at Zoo Atlanta on Saturday and Sunday. (Courtesy of Zoo Atlanta)

Credit: Photo courtesy of Zoo Atlanta

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Known as a dogged investigator, Ashleigh Merchant made a name for herself in Cobb County’s tight-knit legal community by taking big swings. (Natrice Miller/AJC)