Aftershock: The Next Economy and America's Future by Robert B. Reich. âAftershockâ¦â is the interesting concise book that deals with how our economy came to be, how we can learn from history and some specific ideas on how we can address these problems.
Both the cardiac muscle and nervous tissue in the brain and spinal  cord have no functional regenerative capacity.
Creatures that regenerate limbs and organs have stem cells that keep this ability throughout their life cycles. If a salamander's leg is cut off, for example, its stem cells rush into action and form a fast-growing mass of undifferentiated cells called a regeneration blastema, which eventually will differentiate and form the various structures of a new limb.