A mouse embryo grows from stem cells made by stressing blood cells with acid. The blood cells are tagged with a protein that creates green light. Courtesy of Haruko Obokata hide caption

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A Little Acid Turns Mouse Blood Into Brain, Heart And Stem Cells

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Maybe someday Jerry won't be laughing at George's follicularly challenged scalp. But despite scientific advances there's still no cure for baldness. NBC/NBC via Getty Images hide caption

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"Liver buds" grow in petri dishes. The rudimentary organs are about 5 mm wide, or half the height of a classic Lego block. Courtesy of Takanori Takebe/Yokohama City University Graduate School of Medicine hide caption

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Scientists Grow A Simple, Human Liver In A Petri Dish

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After President Obama overturned Bush-era policy restricting federal funding of embryonic stem cell research in 2009, Nebraska Right to Life led a protest of the research outside the University of Nebraska regents' meeting. Nati Harnik/AP hide caption

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Cloning, Stem Cells Long Mired In Legislative Gridlock

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Human embryos grow in a petri dish two days after scientists in Oregon cloned them from a donor's skin cell. http://www.flickr.com/photos/ohsunews/8726915230/in/photostream//Courtesy of OHSU Photos hide caption

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A scientist removes the nucleus from a human egg using a pipette. This is the first step to making personalized embryonic stem cells. Courtesy of OHSU Photos hide caption

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Scientists Clone Human Embryos To Make Stem Cells

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Shinya Yamanaka from Kyoto University was named the winner of the Nobel Prize in Physiology or Medicine for discovering how mature, adult cells can be reprogrammed into immature stem cells. Shizuo Kambayashi/Associated Press hide caption

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Nobel Winners Unlocked Cells' Unlimited Potential

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Each of these mouse pups was born from an egg scientists created using embryonic stem cells. It's possible the technology could change future treatment for human infertility. Katsuhiko Hayashi hide caption

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Scientists Create Fertile Eggs From Mouse Stem Cells

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The white arrows in these two tumor samples point to a subset of tumor cells that are in a resting state. Nature hide caption

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Lab Findings Support Provocative Theory On Cancer 'Enemy' Within

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Study Suggests Way To Create New Eggs In Women

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Controversy Over Stem-Cell Research Keeps Charities On Sidelines

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