I found this disturbing video, and the link to the document. They always say it's for cancer research. It's NOT cancer research! https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fadma.201806132&file=adma201806132-sup-0001-S1.pdf A functional 3D cortex‐like network is developed by culturing cortical cells in a fully geometrically, mechanically, and electrically interconnected 3D carbon nanotube web through the pores of graphene foam (GCNT web). The GCNT web provides a novel biomaterial able to produce in vitro cortex‐like networks representing a model for preclinical screening of anticancer drugs. This is reported by Miao Xiao, Xiaoyun Li, Qin Song, Qi Zhang, Marco Lazzarino, Guosheng Cheng, Francesco Paolo Ulloa Severino, and Vincent Torre in their manuscript: https://doi.org/10.1002/adma.201806132.