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Specifically , the researchers found that marijuana users with defective versions of GST ( gluthathione S-transferase ) genes , a class of genes that produce detoxifying enzymes that help whisk toxic byproducts from the body , were at no greater risk of oral cancer than those who carry normal versions of GST . The researchers found in animal studies that there is a " severe " tolerance to steroids that occurs soon after their initial use that blunts the effects of the drugs . Though the Mecp2 gene is expressed throughout the body , the researchers found that the Rett-like symptoms in mice were caused by brain malfunction rather than problems of Mecp2 deficiency in the rest of the body . " Checking the Internet , the researcher found a photo of Blair in our Barnes Collection . The researchers found that the charged atom beams can move material as well as remove it . The researchers found that numerous animals lived during the time of Ardipithecus ramidus kadabba .