Guest: Victor K. McElheny.

The Human Genome Project is one of the most important accomplishments in modern science. Science writer Victor McElheny joins Focus today to talk about the origins of the Project, the race to achieve the end goal, and today's efforts to exploit its results. It's not only a major event in medicine, says McElheny, but a striking example of how new technologies contribute to the formation of new hypotheses.

Guest: Tim Junkin.

In 1984, Kirk Bloodsworth was sentenced to death for the rape and murder of a nine-year-old girl. Determined to escape the ruling, he found a lawyer willing to fight for a new technique to be used for evidence that would prove Bloodsworth innocent. After nine years in one of the country's toughest prisons, he became the first death row inmate in America to be exonerated by DNA. Our guest today on Focus, novelist Tim Junkin, tells the full story in his book Bloodsworth.

Guest: Nicholas Wade.

The sequencing of the human genome is set to change medicine forever. Today on Focus, science writer Nicholas Wade joins the show to explore the impact genetic science will have on how diseases are diagnosed and treated. We'll also review stem cell research, the treatment it may be able to offer treatment for a range of debilitating conditions, and the ethical controversy still surrounding it.

Guest: Bryan Sykes.

What if we could trace our genetic makeup all the way back to fewer than ten primeval individuals? In fact, says geneticist Bryan Sykes, we can. He joins us today on Focus to explain how the study of a 5,000-year-old man's frozen remains in Italy led to the discovery of a particular strand of DNA that can be traced back to seven prehistoric women: The Seven Daughters of Eve.