Cuba to Get Rid of Dollars After a Decade  HAVANA (Reuters) - Cubans rushed to change dollars into  local pesos on Tuesday as President Fidel Castro's communist  government prepared to pull the U.S. currency from circulation  more than a decade after it was legalized here.
Stem Cell Molecules Repair Genetic Damage Researchers report that embryonic stem cells sent molecular signals that repaired fatal genetic damage to heart cells in laboratory mice.