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Isabella Beukes, of Santa Rosa, Calif., has been legally blind for more than 40 years. An experimental treatment derived from embryonic stem cells seems to have enabled her now to see not just color but also some shapes. Tim Hussin for NPR hide caption

itoggle caption Tim Hussin for NPR

Icon Genetics' Dr. Frank Thieme selects samples of Nicotiana benthamiana, a relative of tobacco, growing in a company greenhouse in Halle, Germany. The company uses the plants to produce antibodies that could be helpful for increasing supplies of ZMapp. Sean Gallup/Getty Images hide caption

itoggle caption Sean Gallup/Getty Images

Insulin is produced by the green cells that are in clusters about the same size as the islets in the human pancreas. The red cells are producing another metabolic hormone, glucagon, that prevents low blood sugar. Harvard University hide caption

itoggle caption Harvard University

The new microscopy technique (lower right) brings into focus details of cell structures never seen before with light. Courtesy of A. Honigmann, C. Eggeling and S.W. Hell, MPI Göttinge hide caption

itoggle caption Courtesy of A. Honigmann, C. Eggeling and S.W. Hell, MPI Göttinge

The history of how the birth control pill was developed in the 1950s is recounted in Jonathan Eig's new book The Birth of the Pill. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Joe Kiani, addresses the second-annual Patient Safety, Science & Technology Summit in January 2014. Courtesy of the Patient Safety Movement Foundation hide caption

itoggle caption Courtesy of the Patient Safety Movement Foundation

A man stands above a new Ebola treatment center in Monrovia, Liberia. Health workers in Liberia, the hardest-hit nation, have turned people away from treatment units because of shortages of beds and staff. Pascal Guyot/AFP/Getty Images hide caption

itoggle caption Pascal Guyot/AFP/Getty Images

Molecular biologist Randy Sheckman, who shared the 2013 Nobel Prize in physiology or medicine, acknowledges applause after receiving his prize during the ceremony in Stockholm last December. Pascal Le Segretain/Getty Images hide caption

itoggle caption Pascal Le Segretain/Getty Images

Proton beam therapy can precisely target tumors to avoid harming surrounding tissue, advocates say. Blythe Bernhard/St. Louis Post-Dispatch/MCT/Landov hide caption

itoggle caption Blythe Bernhard/St. Louis Post-Dispatch/MCT/Landov