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I am a strong believer in the scientific importance of stem cells and the great promise they hold for developing lifesaving medical treatments of Alzheimer ’ s , Parkinson ’ s disease and other debilitating ailments . That 's why the climate model experts end up believing their own models . Nelson Langer Nelson , PLLC advocates for individuals with brain and other serious personal injuries , and for victims of insurance company misconduct . We cannot afford to be short-sighted about discoveries that may well provide new models for business and for scholarship . Even with new discoveries before us — new discoveries that mean new technologies and new jobs — we sometimes face a resistance and skepticism that the Mercury Seven never encountered . If an illegal worker working in the United States today gets a " work authorized " Social Security number through guest worker immigration legislation , the Totalization Agreement , or perhaps just over time , that worker could eventually apply for Social Security benefits once he or she has met eligibility requirements .