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

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

Lisa Schlager of Chevy Chase, Md., demonstrates outside of the Supreme Court as arguments were made in a case seeking to determine whether the BRCA breast cancer genes can be patented. The court ruled in 2013 that individual genes can't be patented. Tom Williams/CQ Roll Call/Getty hide caption

itoggle caption Tom Williams/CQ Roll Call/Getty

A Public Health Agency of Canada worker seen inside the National Microbiology Laboratory's Level 4 lab in Winnipeg. Public Health Agency of Canada/Nature hide caption

itoggle caption Public Health Agency of Canada/Nature

Jude Law prepares for the looming pandemic in the 2011 movie Contagion. There are huge differences between viruses in movies and Ebola in real life. Warner Bros/The Kobal Collection hide caption

itoggle caption Warner Bros/The Kobal Collection