11.   There are more human brain cells on this space station than there are stars in this galaxy.

12.   We are only just beginning to unravel the mysteries of the human brain.

13.   New research into the functioning of the human brain has yielded up some surprising discoveries.

14.   This discovery has revolutionized our understanding of how the human brain works.

15.   Scientists are learning more about how the human brain works.

16.   The drawing showed the human brain in cross section.

17.   In fact many people believe that we are only now really starting to learn the truth about how the human brain works.

18.   But he has also started to look into the workings of that other universe which is inside himself -- the human brain.

19.   The human brain contains a record of every event experienced.

20.   We have developed a combination depth electrode and microdialysis probe suitable for implanting in the conscious human brain to measure extracellular concentrations of glutamate and GABA in epilepsy.