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Technology has become the driving force propelling medical research and treatment. This section examines advances in genetics, stem-cell research, and cloning that are being pushed through or fought against by the forces of politics, business and culture.

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Smoke Breaks Boost Memory02:00 AM Sep. 09, 2005 PT Cigarette smokers have known for centuries that lighting up can help them concentrate. Now pharmaceutical companies are trying to create cleaner, safer ways to improve upon that effect. By Brandon Keim.

Cure for Congressional Paralysis02:00 AM Sep. 06, 2005 PT Steven Edwards potentially has a lot to gain from stem-cell research -- maybe even the ability to move his arms and legs. But the bill Congress is stuck on may not be the answer. Commentary by Steven Edwards.

Day-After Pill Exposes FDA Rift10:10 AM Sep. 01, 2005 PT Although scientists have determined that the so-called morning-after pill is safe enough to be sold without prescription, the head of the Food and Drug Administration overrules them, prompting the women's health chief to resign.

Home DNA Tests Just a Click Away02:00 AM Sep. 01, 2005 PT Online retailers hawk genetic-testing kits but, depending on your point of view, the information the mail-order supplies provide is either useless, a privacy threat or a simple amusement. By Randy Dotinga.

Scientists Decipher Chimp DNA11:39 AM Aug. 31, 2005 PT An international team of researchers decodes the entire chimpanzee genome. It appears that apes and humans are even more similar than previously believed.Plus: Y Chromosome May Not Be Doomed

Y Chromosome May Not Be Doomed11:39 AM Aug. 31, 2005 PT Despite studies showing that the Y chromosome has rapidly lost genes throughout evolution, a new comparison of the chimp and human genomes calls into question the male genetic structure's imminent demise.