Investigation - S1.E3

How a television camera was used to investigate life below the South Pole ice shelf; the use of a one-million-volt electron microscope in the study of human cells; a look at scientists in Africa who investigate the population patterns of elephants in an effort to end the practice of killing these animals when national parks become overrun with the gargantuan, trunked creatures; an interview with Dr. Charles W. Stockton of the University of Arizona, who studies tree growth rings to determine cycles of drought in the Third World; scientists who use electrical current to stun and study native fish, in a conservation program; a look at the massive radio telescopes in New Mexico used to listen to the stars; an interview with Dr. William S. Hall of the University of Illinois, who is in the process of studying children's behavior and sense of language in an effort to understand how children learn best. Includes a voice-over promo for the second program in the series.