CU Psychology and Neuroscience Professor Kent Hutchison (Clinical) and several members of the CUChangelab were in the popular press for some research indicating that there are no size changes in certain sub-cortical brain structures resulting from daily marijuana use. This is contrary to what had been previously reported in other studies which may not have controlled for several critical variables. Read the Reuter's press release, the article in Psychology Today, or read the original paper published in the Journal of Neuroscience.