31.   Both McGoverns said they have been fascinated by the workings of the human brain since childhood.

32.   But a research team has proven for the first time that human brain cells can regenerate.

33.   But Goldman is thought to be the first to generate neurons from adult human brains and grow them in a laboratory.

34.   But in the end, the gray numbers are often translated into colorful three-dimensional pictures, the language human brains comprehend best.

35.   But researchers still did not believe that new cells were created in human brains, Raastad said.

36.   But scientists doubt computers ever will totally replace human brain power for making long-range forecasts.

37.   But the researchers still need to map the entire human brain to determine the precise location of the precursor cells.

38.   But there is no doubt, he said, that the mice have mad cow disease that was passed on to them through human brains.

39.   Colin McGinn reviews three books that examine the future of artificial intelligence and find the human brain is in trouble.

40.   Consider for a moment the immense complexity of the human brain.