1.   Even rarer is the movie that penetrates the surface of that camaraderie and looks unblinkingly at its darker side.

2.   Lightwaves cook the outside of food much like conventional heat, but also penetrate the surface so the inside is cooked at the same time.

3.   Those unexploded munitions often penetrate the surface and effectively turn into land mines.

4.   Those who prefer art that penetrates the surface of culture, perhaps.

5.   What made the viewing possible was a special new laser microscope whose light can penetrate surface of the brain and reveal the deposits.

6.   When a copy of the virus encounters a susceptible white blood cell, it penetrates the surface through a complex of receptors.

7.   What made the viewing possible was a special new laser microscope whose light can penetrate the surface of the brain and reveal the deposits.

8.   It is the first attempt by NASA to crash-land a spacecraft on another planet with the intent of penetrating its surface and sending back radio signals.