The Sciences Woo Suk Hwang, Seoul National University This Korean researcher racked up a series of important advances in embryonic stem cell technology, including the first lines of cells from patients By Aimee Cunningham THIS IS A PREVIEW. Buy this digital issue or subscribe to access the full article. Already a subscriber or purchased this issue? Sign In CORBIS While political debate over stem cells continues, the science has made tremendous strides during the past 18 months. In the frenzy of activity, Woo Suk Hwang has stood out for the impact his team from Seoul National University has had on the still nascent field. Hwang has achieved remarkable progress in a short period. In February 2004 Hwang and his research group reported the first embryonic stem cell line derived from a cloned human embryo. By May 2005 they had used cloning techniques to create 11 stem cell lines, each one the perfect genetic match of a different patient, another first. In August 2005 they introduced the first cloned dog. And in October 2005 they announced a plan for a stem cell bank open to scientists worldwide. THIS IS A PREVIEW. Buy this digital issue or subscribe to access the full article. Already a subscriber or purchased this issue? Sign In Buy Digital Issue $7.99 Add To Cart Print + DigitalAll Access $99.99 Subscribe ADVERTISEMENT Scientific American is a trademark of Scientific American, Inc., used with permission © 2015 Scientific American, a Division of Nature America, Inc. All Rights Reserved.