stem cells

How Stem Cells Work

Since scientists realized there is a type of cell that can grow into any other type, they have worked to use them to heal human conditions like Parkinson's and immune disorders. But because stem cells often come from embryos they remain controversial.

Your limb is torn off - now what?

Were you to be the unfortunate victim of a limb removal of any sort, you could take hope. Here in the 21st century, doctors have gotten pretty handy at reattaching arms and legs, replacing thumbs with toes, rebuilding breasts, all to great success thanks to microsurgery techniques.