00:00for years scientists have been working on ways to grow human organs inside animals hoping to
00:08make organ transplants easier and more available but what if rather than new livers or hearts or
00:13kidneys instead we were able to use animals to regrow parts of the brain that may have
00:17degenerated over time restoring lost cognitive function before taking those brain fragments
00:21and re-implanting them in humans well that's what scientists at the university of california
00:26san diego are looking to achieve and they recently made a huge breakthrough they took cortical
00:30organoids from humans or what are sometimes called mini brains and implanted them into mice and now
00:36after months of stimulation they've been able to measure electrical activity in the transplanted
00:41brain in response to visual light cues meaning there are now functional connections connecting
00:45the mouse brain to the human mini brain this all happened in only a month and another month later
00:49the mini brain was even more integrated now the question remains with future innovations and with
00:54the use of stem cells to the repair bit of brain be removed and implanted back into a human
