100:00:02,838 --> 00:00:04,021The human brain.200:00:04,041 --> 00:00:06,131This is the reasonI asked Dr. Grey300:00:06,175 --> 00:00:07,741if I could fill in for herthis morning.400:00:07,777 --> 00:00:10,311Nature makes a beautiful machine.500:00:10,346 --> 00:00:11,579Don't you think?600:00:11,614 --> 00:00:13,280