Bioengineers are creating human body parts to replace organs and manage life-threatening diseases. How techniques like 3-D printing and stem cell research are driving medical advances and raising ethical questions
A geophysicist explains why all the earth’s glaciers will likely be gone by 2031, and how to best prepare for the possibility of a world without ice.
- Henry N. Pollack professor of Geophysics at the University of Michigan; he and his colleagues on the Intergovernmental Panel on Climate Change shared the 2007 Nobel Peace Prize with Al Gore; now serves as a science adviser to Al Gore's Climate Project training programs.
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